Abstract: The invention relates to a heavy machine-operated sieve screen bucket. A plurality of screening plates (3) are spaced from each other and establish a screening surface (2), which is provided with screening slots and on top of which the material to be screened can be placed. There are rotatable shafts (4) below the screening surface (2). The shafts (4) are provided with blades (5), which are projecting from the shafts and which extend through the screening slots to above the screening surface (2). The blades (5) taper in a wedge-like manner towards their rounded tips. Side edges of the blades (5) are substantially straight and the angle between the same is in the range of 20-28°.

Abstract: A compact mobile variable angle vibrating screen with a suspension and dampening system configured to rapidly accommodate variable angles and exhibit acceptable vibration levels; especially during power up and power down surge vibration at the variable angles. The system comprises a group of bi-directional dual pivot leg vibration damper mechanisms, including nesting tubes, one with holes for receiving pins and the other with a semi-circular cutout at the bottom edge.

Abstract: A device, method, and system for analyzing aggregate are described. An exemplary device may include a housing with one or more grading screens. Aggregate and liquid may be received by a port within the housing. The liquid and any suspended fines, after passing through the one or more grading screens and aggregate, may be received into an observation container for observing the clarity of the liquid.

Abstract: A sieving device including a hollow cylindrical body, a filter disposed at a bottom portion of the hollow cylindrical body, and a blade configured to rotate in close proximity to the filter around a rotation axis thereof crossing the filter to thereby stir powder supplied to the hollow cylindrical body.

Abstract: The invention relates to a method and to a device for the selective classification of particles according to the size thereof, determined by a maximum main dimension (a, b, c) of their particle geometric form, by means of classification using passage openings with a three-dimensional classification effect in a screening structure.

Abstract: A particle size separator includes an upper separator frame, a lower separator frame, a screen disposed between the upper separator frame and the lower separator frame, a large size particle outlet having an inlet disposed below the screen, a small size particle outlet disposed in the lower separator frame and a combined baffle and seal unit disposed in an opening in the screen. The unit has a seal face configured to sealingly engage the inlet of the large size particle outlet. The unit has a baffle configured to constrain movement of particles on an upper surface of the screen into the inlet. The baffle is configured to sealingly engage an interior wall of the upper separator frame.

Abstract: A screening apparatus for separating components of a material by vibratory separation which, in certain aspects, includes a vibratable box connected via vibration isolators within a container, the box including screening apparatus thereon or the vibratory separator having replaceable screening cartridges within a container. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: A feed and sorting device for tablets has a number of vertically extending filling tubes for tablets, and a blocking slide unit for temporarily blocking the guiding channels of the filling tubes. The blocking slide unit includes a base plate with through-openings for the filling tubes and a plurality of blocking fingers designed as integral parts of the base plate and horizontally extending into the through-openings. Each blocking finger is assigned to one of the filling tubes.

Abstract: A screening machine of the type used to separate or classify mixtures of solid particles of different sizes includes a fixed base and a perforate screen mounted for movement relative to the base during a screening operation. The screens are pre-tensioned and mounted in a perimeter frame for separating various granular and particulate material. The frame is slid into the side of the machine in a direction parallel with two opposing bevel lips at the ends of the frame which mate in the screening machine with a complementary channel such that when the screen is raised into sealing contact in the screening machine, the bevel ends of the screen panel frame align the screen panel in the machine. The bevels on the screen panel frame provide a positive sealing surface for contact with the adjacent portions of the channel to prevent product from escaping off of the screen during use.

Abstract: An attrition mill for reclaiming foundry sand from deposited material having lumps of used foundry sand and included material includes a housing defining a chamber for receiving the lumps of used foundry sand and included material. A base is disposed within the housing and has an elevated end defining a reject outlet adjacent a reject end of the mill and a lower end, and a discharge wall is positioned adjacent the base lower end to define a sand outlet adjacent a sand end of the mill. A resilient support is attached to the housing, and a vibratory drive is attached to the housing and includes first and second eccentrically loaded motors.

Abstract: A screening machine of the type used to separate or classify mixtures of solid particles of different sizes includes a machine frame and a perforate screen panel mounted for movement relative to the machine frame during a screening operation. The screen panels are pre-tensioned mesh screen material mounted in a peripheral rim for separating various granular and particulate materials. The screen panel is slid into the side of the machine frame in a direction orthogonal to the direction particulate matter moves when the screening machine is operating. The screen panel peripheral rim has a shaped or other cross section adapted to hold a large seal member that provides a positive sealing surface for contact with the machine frame to prevent particulate matter from escaping off of the screen panel during use.

Abstract: An air classifier contains a cylindrical casing provided with at an upper part thereof a feed port to feed high pressure air and a powder material, an umbrella-shaped center core in the casing, and an umbrella-shaped separator core arranged downstream of the center core in the casing and including an opening at center thereof. The air classifier has a configuration containing a dispersion chamber to disperse the powder material, being surrounded by an inner wall of the upper part casing and the center core, and a classification chamber to classify the powder material into fine and coarse powders by centrifugation, being surrounded by the center core, separator core and inner wall of the casing. In the dispersion chamber provided are a louver ring containing guide slats circularly arranged at regular intervals, and a space encircling the louver ring and serving as flow passage of the air and powder material.

Abstract: An attrition mill for reclaiming foundry sand from deposited material having lumps of used foundry sand and included material includes a housing defining a chamber for receiving the lumps of used foundry sand and included material. A base is disposed within the housing and has an elevated end defining a reject outlet adjacent a reject end of the mill and a lower end, and a discharge wall is positioned adjacent the base lower end to define a sand outlet adjacent a sand end of the mill. A resilient support is attached to the housing, and a vibratory drive is attached to the housing and includes first and second eccentrically loaded motors.

Abstract: An integrated terminal deck and spout assembly for a vibrating separator and a method of fabricating a terminal deck constructed such that the deck has a protruding tongue which extends out past the deck blank. The protruding tongue forms the bottom plate of the discharge spout. This reduces the number of parts necessary to assemble a terminal deck. It also provides a structurally stronger discharge spout than found in the prior art and reduces the time and labor necessary to assemble a terminal deck. This change in design also reduces fatigue cracking in the deck blank near the terminal deck discharge spout.

Abstract: The invention in the simplest form is a passive method and apparatus for filtering motile sperm from a sperm sample. The invention passively filters the motile sperm using a membrane assembly disposed in a container. In operation, a sperm sample is placed on one side of the membrane assembly, and the motile sperm migrate through the membrane where they can be easily extracted.

Abstract: A system and process for recycling shredder residue, in which separating any polyurethane foam materials are first separated. Then separate a fines fraction of less than about ¼ inch leaving a plastics-rich fraction. Thereafter, the plastics rich fraction is sequentially contacted with a series of solvents beginning with one or more of hexane or an alcohol to remove automotive fluids; acetone to remove ABS; one or more of EDC, THF or a ketone having a boiling point of not greater than about 125° C. to remove PVC; and one or more of xylene or toluene to remove polypropylene and polyethylene. The solvents are recovered and recycled.

Abstract: A sampling means for sampling a falling stream of a particulate material includes a trough-like sampling receptacle for culling a sample of the particulate material, the receptacle having an inlet defined in an operatively top portion thereof and at least one outlet; a shaftless spiral conveyor rotatably received within the receptacle for discharging the sample through the, or each, outlet; drive means operatively connected to the shaftless spiral conveyor for driving the said conveyor; and displacement means for displacing the sampling receptacle between first and second positions on opposed sides of the falling stream of material, to permit the inlet of the sampling receptacle to cut the falling steam of material at pre-determined intervals.

Abstract: The invention in the simplest form is a passive method and apparatus for filtering motile sperm from a sperm sample. The invention passively filters the motile sperm using a nucleopore membrane that is contained within a membrane assembly, wherein the membrane assembly is disposed in a container. In operation, a medium is placed in the container so the membrane contacts the medium. A sperm sample is placed one side of the membrane assembly, and the motile sperm migrate through the membrane leaving the non-motile sperm behind, where they can be easily extracted.

Abstract: The present invention provide apparatus and method for removing agglomerates from a slurry comprising a transport fluid and particulate matter carried by the transport fluid. The present invention includes a fluid flow control unit and an agglomerate removal unit fluidly connected thereto. The fluid flow control unit provides for a reduction in the flow velocity entering the agglomerate removal unit by increasing the output cross section relative to the input cross section and by providing a dewatering door that can be opened to varying degrees to allow variable outflow of transport fluid from the fluid flow control unit. The agglomerate removal unit has at least a first screen over which the slurry flows as it exits the fluid control unit. The screen includes a plurality of apertures appropriately sized to allow the transport fluid and the particulate matter to flow therethrough but not the agglomerates.

Abstract: An apparatus is provided for the removal of oversized contaminants from particulate material the is particularly suitable for the removal of contaminants from low density, high surface area particulate materials. The removal of contaminants is accomplished during the transfer of the particulate material from its storage or transport container to a receiving container. The apparatus comprises an assembly having a weir, a trap disposed adjacent said weir, a screen o for separating particulate material from oversized contaminants, a baffle, and an opening through which particulate material will flow freely. The weir has a weir trap flange extending laterally from a weir wall. The trap is configured to capture contaminants if the container to which the assembly is secured is maneuvered to initiate the flow of the particulate material from the container to the receiving container. When so maneuvered, the lowermost portion of the trap in the proximity of the flow of the particulate materials subtends the weir.

Abstract: This invention relates to a screen separator for separating metal adsorbent particles from a pulp and includes a screen separator for separating metal adsorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing pulp with the open top of the screen at or adjacent the full pulp surface level in the tank, an impeller which is located in the screen with its axis of rotation vertical, drive means, and a drive shaft connecting the drive means to the impeller with the impeller being adapted to drive pulp in the screen upwardly to a level above the surface level of the full pulp level in the tank when the impeller is rotated in the screen. The invention further extends to a method of separating the particles from the pulp by means of the separator and to a metal recover process which employs the separation method.

Abstract: A seafood separator for separating sea creatures captured by a net is provided, comprising a support structure attached to the deck of a boat; a number of vertically arranged frames attached to the support structure, each frame containing a screen for retaining sea creatures of predetermined sizes, wherein the grid spacing of each screen is smaller than the grid spacing of any higher screen. Each screen is capable of slidable motion relative to the support structure or to any other screen in order to facilitate cleaning and seafood removal. A tray for collecting trash and unwanted seafood is attached to the support structure below a lowermost screen and has an end positioned over the boat deck to allow return of the trash back into the sea. A method for separating sea creatures and returning undesirable sea creatures back to the sea alive is also provided.

Abstract: There is disclosed a screening apparatus for screening particulate material and which comprises a base frame, an elevating conveyor adjustably mounted on the base frame and arranged to convey material from a loading station at or near a lower end of the conveyor to a discharge station at an upper end of the conveyor, a sub-frame adjustably mounted on the base frame and carrying a vibratory screen for receiving material falling from the conveyor, a drive mechanism for adjusting the position of the conveyor along a guided path of movement, and a coupling arrangement which couples the conveyor and the sub-frame together in such a way that adjustment of the position of the conveyor relative to the base frame is accompanied by corresponding adjustment of the position of the sub-frame relative to the base frame so that the vibratory screen can take up any required attitude to suit particular requirements and in which it is still able readily to receive material falling from the upper end of the conveyor.

Abstract: A stock screening apparatus has a material supply port which communicates with a material supply passage, and a first discharge port which communicates with a first discharge passage. The first discharge passage is located within a downward projected image of the material supply passage. In consequence, the stock which flows into a primary chamber flows in a vortex along the periphery of the primary chamber, and the foreign materials contained in this vortex, such as stones or metals, can thus be discharged through the first discharge passage when they are moved to the first discharge port. Also, a rotary shaft of a drum-shaped rotary body is disposed horizontally. An opening of the portion of the primary chamber located downstream of the drum-shaped rotary body and that of the secondary chamber are closed by a cover.

Abstract: An apparatus and method for obtaining fine metals from gravel. A tiltable, rotatable cylinder has an inlet and an outlet. A mesh is positioned a predetermined distance from the inside diameter of the cylinder and extends around the periphery of the inside circumference. A first recovery ring is located downstream from the inlet and has an inside diameter greater than the inside diameter of the cylinder. An exit extends from the inside diameter to the outer periphery of the first recovery ring.

Abstract: A screen system intended for the screening of wood chips, comprising one or several screening faces (2,3) placed one above the other as well as a bottom face (4) placed underneath said screening faces. The screening faces (2,3) are connected to members (10) that produce the screening movement. The bottom face (4) is made of a flexible material and is displaceable relative its support structure (6) so that the bottom face is deformed to prevent the adherence of materials thereto. Most appropriately, the width of the bottom face (5) is larger than the distance between the support structures (6) placed at its sides, whereby the middle portion of the bottom face (5) is hanging down lower than its sides.

Abstract: An apparatus for separating dough balls from reusable breading having a container for holding breading containing dough balls, the container having an aperture in the bottom thereof for selectably discharging the breading having dough balls co-mingled therewith, a sifter having foraminous portions positioned below the container bottom aperture and having a bottom with a central opening therein, an actuator to cause breading to be sifted through the foraminous portions, a plurality of concentric circular walls having openings therethrough arranged to cause dough balls to be separately discharged through the sifter central opening, a breading collector container below the sifter to receive breading sifted from the sifter, and a dough ball collector directly below the sifter central opening for separately receiving dough balls passing therethrough.

Abstract: The invention relates to a device for screening pulp, comprising a screen drum (2) provided with holes for the passage of an accepted pulp fraction therethrough; and a blade (10) for a screening device. The device comprises straight blades (10) wiping the surface of the screen drum (2) and extending in parallel with the axis of the screen drum (2). Reject which does not pass through the screen drum (2) is removed through a reject discharge opening (5) at the other end of the screen drum. For transferring the reject from the surface of the screen drum (2) to the reject discharge end, the surface of the blades (10) is on the screen drum side provided with grooves (11) so inclined that the front end of the groove (11) is closer to the pulp input than the rearmost end of the same groove (11). Thereby each groove (11) in the blades (10) causes the reject to be transferred towards the reject discharge opening (5).

Abstract: A vibratory screening machine having a main frame, a screen frame pivoted at substantially its midpoint on the main frame, a weir which receives a liquid-solid mixture to be screened, a discharge spout on the weir, a linkage interconnecting one end of the screen frame with the discharge spout, and a hand wheel effectively connected to the discharge spout to raise and lower it and thereby simultaneously adjust the inclination of the screen frame while maintaining the drop of the liquid-solid mixture being discharged onto the screen frame substantially constant in all inclined positions of the screen frame.

Abstract: A drum separator includes a cylindrical screen drum which is mounted for rotation within a sealed housing such that a small portion of the perimeter of the screen drum is exposed. Air, fibers, and fines are introduced onto a first part of the exposed portion of the screen drum and fines and air pass through the screen drum into the interior of the housing and then to a fines collector. Fibers which are too large to pass through the screen drum are carried by the rotation of the screen drum to a pick-up head which applies a low pressure to the exterior of the screen drum to remove the fibers. The pick-up head is pivotably mounted to the housing, and air cylinders lift the pick-up head away from the screen drum in the event of an impact. The pick-up head includes a pick-up bar and a plurality of fins which are shaped to optimize removal of fibers from the exterior of the screen drum.

Abstract: An improved method for screening and fractionation. By using a housing interiorly divided by a screen plate into a primary and a secondary chamber with the secondary chamber further divided by a fluid impermeable wall, a process fluid stream containing particulate material has a second and a third process fluid stream diverted from it. The second stream is outputed from the housing while the third stream is recirculated to the first chamber. It is demonstrated that high screening or fractionation efficiency is obtained by this method.

Abstract: Apparatus for cleaning, aerating and fumigating grain comprises chutes having screens therein over which the grain is passed. Conduits interconnect the chutes with a blower mechanism so that the grain to be cleaned is subjected to a vacuum which causes the fine debris, trash and the like to be passed through the screen. The fine debris is entrained in a stream of air and directed exteriorly of the grain storage structure. The conduits connected to the blower assembly may be detached from the grain cleaning chutes and connected to tubes inserted into the grain to permit heated gases and moisture to be removed from the stored grain. An air entrained fumigant may also be directed through the tubes into the grain for controlling insects and the like.

Abstract: A device for separating fine articles as sand from a sludge containing ultrafine articles comprises a continuously rotated substantially horizontal drum having a helical web at the peripheral inside thereof. The mass flow to be separated is deposited in the drum at a place spaced from both ends of the drum. The drum moves the sand at the bottom of the drum to the discharge end thereof, where a water feeding system is arranged providing an oppositely directed fresh water flow which mixes with said ultrafine particles forming a sludge. The sand is elevated at the discharge end of the drum by a plurality of buckets and discharged via an inclined discharge chute through an outlet opening of the drum. The sludge is discharged through the opposite front wall opening through which the mass flow is fed within a feeding tube.

Abstract: A grain cleaner having a plurality of cleaning sections radiating outwardly from a grain inlet. Each cleaning section has upper and lower downwardly sloped screens over which grain flows by gravity to sift out fine foreign material. Upper and lower foreign material chambers underlie respective screens, and external bypass ducts bypass foreign material from each upper chamber to an associated lower chamber of each cleaning section. Each lower foreign material receiving chamber communicates with a centrally located foreign material discharge outlet at the bottom of the cleaner.

Abstract: The invention relates to the dry cleaning of grain and discloses a new process and an apparatus. In the new process a deep layer of grain is formed on an upper screen, the holes of which are larger than the grain particles, and a compacting effect is produced in the bottom zone of the layer by vibratory forces. Sand particles sink into the layer compacting near the screen, and this layer drops completely--i.e. together with the sand particles--directly on to a second screen situated therebeneath. The sand passes through the bottom screen. The double screen is preferably preceded by a coarse screen. The apparatus is modular and comprises as separate modules a screen box, a head section containing the grain inlet and a tail section containing the outlets. A number of screen boxes of different sizes and head and tail sections of different sizes and arrangements may be provided to make it possible to supply a number of screening systems of different sizes.

Abstract: Apparatus for separating a composite of three materials into their particular groups includes a first screen (17) which permits the group of the smallest sized material to pass therethrough. The materials not passing through the screen (17) are fed to a trough (21). Second screens (23) are provided near the end of the trough which permits the group of the mid-sized materials to pass therethrough. The group of the largest sized materials move to and through a discharge spout (25) at the end of the trough (21).

Abstract: A sizing screen for particulate material of different sizes has a generally horizontal rotatable circular screen surface having a plurality of elongate radially projecting members, first collection means positioned adjacent the outer periphery of the surface for collecting an oversize fraction of the particulate material, second collection means positioned below the surface for collecting an undersize fraction of the material which passes through the screen. Discharge means comprising a rotatable table partitioned into different parts for carrying the oversize and undersize material is positioned below the first and second collection means. A plough or paddle preferably urges material from the table into outlets. The screen is suitable for handling sticky material such as coal fines and clay.

Abstract: The exchangeable planar screen includes a screen frame having an open lateral wall and a collecting floor and, above the floor, a meshed fabric; a duct unit assembled of at least two separate and intersecting channels adjoins the open wall of the frame whereby one channel is flush with the collecting floor and the other channel has a funnel-like inlet section adjoining the edge of the fabric and is directed perpendicularly relative to the one channel.

Abstract: The disclosure concerns an apparatus for separating impurities from a fibrous suspension. The apparatus includes a tiltable housing having a screen basket supported coaxially therein. A rotor is supported inside the screen basket. The rotor has three zones. There is an upstream zone communicating with the fiber suspension inlet, and inlet in the upstream zone is into the interior of the rotor and then outward past sorting vanes formed at the exterior of the rotor in the first zone and inside of the basket. Downstream of the transport vanes is a second baffle zone defined by a closed drum having transport vanes on the outside thereof. The suspension and impurities are moved downstream by the transport vanes in the second zone. Downstream of the second zone is a third zone with further means for moving impurities downstream, comprising either a centrifugal impeller in the form of vanes or a helical ring.

Abstract: Apparatus for the production of a middle layer of chipboards or the like and/or for the manufacture of chipboards formed only from middle layer material includes at least one spreading station associated with a spreading chamber arranged above a moving support for the reception of a chip layer or the like, the entire fine or coarse materials serving for the formation of a type of middle layer being fed by at least one metering tank to the support. The apparatus is further characterized in that at least one inclined screen which can be reciprocated in an essentially horizontal direction is disposed underneath the delivery point of the metering tank and a spreading roll is disposed underneath the lower edge of the screen in parallel to the screen edge, the roll serving for feeding the coarser material to the space lying beneath the screen.

Abstract: An apparatus for straining liquid fibrous suspensions to remove contaminants and foreign objects has a stationary screen basket located in a housing. Purging blades rotate in the interior of the screen basket in close proximity to the interior walls of the screen and create pressure pulses, causing trapped contaminants and foreign objects to migrate toward an outlet, whereas the purified suspension, including the useful fibers, passes through the screens.The average path traversed in the apparatus by contaminants and foreign objects is shortened due to the disposition of an intermediate chamber, at mid-height of the screen basket, through which contaminants may also be eliminated from the apparatus. The purging blades are appropriately extended to sweep the walls of this intermediate chamber. The shortened average path reduces the probability that contaminants will pass through the screen on their way to the outlet.

Abstract: For the purposes of saving flour and removing flour from the air for the safety of workers, large quantities of dusting flour used during the transfer of rolls from a standard dough dividing and rounding machine to a standard aging and panning machine is allowed to gravitate within an enclosure onto a screen covered flour chute which communicates at its lower end with a vacuum nozzle. The vacuum nozzle is connected by means of a hose with an overhead suction device on a flour holding tank having a flour sifting means at its lower end for delivering the dusting flour onto rolls while they are passing through a transfer chute between the two standard machines.

Abstract: Vibrating screen apparatus wherein high screening output is achieved by providing a series of inclined screens in generally end to end relation whereby undersize material passing through the screens is received in a common hopper disposed beneath the screens. The oversize material falls from the lower end of each screen and guide means thereat directs the oversize material from the several screens into a common conduit extending longitudinally beneath the screens to conduct the oversize material from the apparatus. A splitter above the apparatus divides the input material into equal parts corresponding to the number of screens and discharges such parts onto the upper ends of the several screens.

Abstract: A foundry sand reclaiming apparatus is provided in which lumps of used foundry sand are introduced into a vibrating chamber. The lumps abrade each other to produce discrete particles of reusable foundry sand. As the sand builds up in the chamber, the vibratory action moves the sand to an exit opening from which it is discharged from the vibrating chamber. The vibratory conveying action produced during the sand abrading step may be reversed to cause irreducible particles to move toward and be removed from a discharge outlet.