Abstract: A vibratory screening machine includes a primary screening area and a pre-screening assembly including a frame and screen assemblies. The screen assemblies are secured to the frame and form a pre-screening surface. The frame is attached to the vibratory screening machine such that the concave pre-screening surface is above the primary screening area.

Abstract: A multi-screener apparatus in which the height of the apparatus may be adjusted for the convenience of a user. This multi-screener apparatus prevents the unwanted movement of the apparatus frame without the addition of counterweights or excessive frame mass to prevent the unwanted movement. Also, this multi-screener design may function with a variety of power sources, including electrical and fossil fuel based power sources. The unit is easily placed in a desired location by optional vehicle attachment means for towing as well as gripping handles and wheels for manually positioning the apparatus in a desired location. Further, the lightweight design of the apparatus also plays an important role regarding the mobility of the apparatus.

Abstract: A mechanical bucket for separating small material from larger material. The mechanical bucket includes a bucket adapted to receive and retain material within the bucket and a roller screen assembly removably secured to a bottom portion of the bucket. The material received within the bucket rests on the roller screen assembly when deactivated. The roller screen assembly is adapted to separate smaller material from larger material of the material received within the bucket when activated. The mechanical bucket may include a scraper device for removing debris from the roller screen assembly when the roller screen assembly is activated.

Abstract: A method of separating drilling/production fluids from solid cuttings from a mixture received from down hole, without the use of shale shakers, de-sanders, or de-sanders, through the steps of flowing the mixture from the well bore into a flow line above the surface of a well; next, flowing the mixture into a single separation zone of a size capable of receiving the mixture directly from the flow line on a continuous basis; circulating or centrifuging the mixture to a desired RPM within the separation zone; providing a liquid permeable barrier surrounding the mixture as the mixture is centrifuged within the separation zone; collecting the liquid in a first retrieval zone after the liquid has penetrated permeable barrier; and collecting the solids that could not penetrate the permeable barrier in a second retrieval zone within the barrier.

Abstract: A drive linkage is described for reciprocating a sieve that is suspended within a frame of a combine harvester for movement in mutually orthogonal directions. The drive linkage comprises a cranking mechanism for imparting a reciprocating motion to the sieve in the direction of travel of the harvester and a pivot arm pivotably connected at one end to one side of the sieve to cause the sieve to move in an arc centered on a pivot axis at the opposite end of the pivot arm as the sieve is reciprocated. In the invention, the pivot axis of the pivot arm is displaced relative to the frame in synchronism with the reciprocation of the sieve in such a manner as to cause the sieve to follow a substantially rectilinear path relative to the frame.

Abstract: The present invention relates to a sieve device for screening at least two solid substances preferably different from each other comprising at least one sieve module (1), comprising at least two sieve devices (2), comprising at least one fitting (3) with a bottom with sieve (4), closing the respective fitting (3).

Abstract: A plant (1) for the collection and disposal of municipal waste has a plurality of hoppers (2, 3, 4, 5) for accepting differentiated waste and a plurality of containers (36, 38, 39, 40) for the storage of respective types of waste; is at least partially buried with the hoppers (2, 3, 4, 5) on the surface and is equipped, in situ, with conveyor means (27, 29, 34) for transporting the waste from the hoppers (2, 3, 4, 5) to the containers (36, 38, 39, 40) and with refining systems (23, 28, 29, 35) positioned along the conveyors (27, 29, 34) for the mechanical and/or chemical and/or physical treatment of the waste.

Abstract: Process and apparatus for wet screening fibrous suspensions with a screen having a plurality of screen openings. The process includes guiding a portion of the fibrous suspension passing through the plurality of screen openings, which are formed as long holes having widths of between 1 and 8 mm, as accepted stock, and guiding a portion of the fibrous suspension not passing through the long holes separately from the accepted stock as rejected material. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: In a food processor (1) with a drivable apparatus part (17) provided for interacting with a material which is to be processed and with driving means (9) for driving the drivable apparatus part (17), said driving means (9) comprising at least one driving part (11,12,13,14,15), either a driving part (11,12,13,14,15) of the driving means (9) or the drivable apparatus part (17) is used for driving a sifter device (27).

Abstract: An Internet download enhancement system for downloading a file comprising an application arranged to initiate a download process and receive a downloaded file over one of a narrow band download path and a broadband broadcast download path, wherein modules in communication with the application are arranged to provide selectable download options among the available download paths. The selectable download options are based at least on an unused bandwidth of one or more of the download paths, thereby enabling the input of a selected download option. The modules are arranged in response to the input to cause a download process to download files over one of the narrow band download path and the broadband broadcast download path and then to output the downloaded file to application.

Abstract: The present invention is an integrated screen comprising a screen portion having openings and an integral protector edge disposed about the periphery of the screen portion. This integrated screen protector edge can be utilized individually as the membrane support/flow field in an electrochemical cell or in conjunction with one or more subsequent screen layers. When utilized with subsequent screen layers, the integrated screen protector edge is disposed adjacent to and in intimate contact with the membrane assembly.

Abstract: The invention is related to mining industry, namely to devices for dispersion of solid minerals in particular quartz sands and associated minerals.

Abstract: A coin conditioner is provided for cleaning or otherwise conditioning coins in a coin discriminator apparatus prior to transfer to a coin sensor. Coins enter through a feed tray and move down the length of a perforated tumbler, preferably without the use of gravity, such as under screw force, mechanical or centrifugal force. The spinning tumbler is preferably rotated about its longitudinal axis by a motor. In one embodiment, a blower or vacuum draws or moves air from one area to another, with the air preferably being filtered. As coins move through and down a tumbler, projections such as vanes, fins, ridges, dimples, spines or other raised features cause mechanical agitation and/or abrasion as coins are lifted and dropped while passing longitudinally through the tumbler. The coins are conditioned and non-coin matter is collected as it is separated and/or abraded from the coin surfaces.

Abstract: From one aspect the invention is a method of classifying waste materials comprising arranging two sieve screens, each having an inlet end and an outlet end, one above the other to define a space there between, arranging the upper screen, to be of coarser mesh size than the lower screen, supplying waste material to be classified to the inlet end of the upper screen, vibrating the screens, and blowing air between the screens from the inlet end and towards the outlet end whereby the waste material being blown away from the outlet ends of the screens, and large heavy material falling under gravity from the outlet end of the upper screen, and separately collecting the separated waste material fractions. From another aspect the invention is an apparatus for carrying out the method described above.

Abstract: Pressure type screening apparatus for screening papermakers' stock and method of use is disclosed. Screen (20) has an inlet screening surface (23) and an outlet surface (unlabled). Pressure transducers (not shown) vary the fluid pressure on the inlet surface of the screen (23) from a maximum to a minimum, and also vary the fluid pressure on the outlet surface of the screen (20) from a minimum to a maximum at a repetitive cyclic rate. The amplitude of such pressures is such that flow reversal occurs through the screen (20) and any fiber mat that tends to form on the inlet surface (23) is disrupted or fluidized.

Abstract: A method and centrifugal separator apparatus for separating more dense particles from less dense particles contained in a slurry. The separator apparatus receives slurry into a rotor assembly which includes a bowl open upwardly and a surrounding hutch chamber. The bowl has a lower impermeable portion coupled to a drive shaft for rotating the rotor assembly, an upper impermeable portion connected to the lower portion, and a frusto-conical screen. The frusto-conical screen forms the inner wall of the hutch chamber and discharge outlets are provided in the periphery of the hutch chamber. An annular fluid inlet connected to the hutch chamber supplies elutriation liquid continuously to the interior of the hutch chamber, and a plurality of pulse blocks supply intermittent pulses of liquid to the hutch chamber. A dam is formed at the top of the screen. In operation, slurry is supplied to the lower portion of the bowl and forms a bed on the screen.

Abstract: A dredge includes a primary grizzly with a sieve for separating dredged material initially into recoverable and discharge portions. A second or auxiliary grizzly and sieve are also provided on a chute extending from the primary grizzly to further remove remaining recoverable material from the portion of material discharged from the primary grizzly. A gate is provided for selectively opening and closing access to the auxiliary grizzly depending upon the make-up of the material discharged from the top of the primary grizzly. The combination of the primary and auxiliary grizzly provide for increased efficiency and effectiveness in recovering a larger percentage of recoverable material from a water-based dredging operation.

Abstract: A screening screen having openings in the warp direction which are longer than these openings in the woof direction including warp wires and woof wires of the same maximum size extending at substantially maximum warp and woof crimp angles relative to each other which will not permit the warp wires and the woof wires to slide relative to each other. A method of fabricating a screening screen of the above type including the steps of determining the size of the openings in the woof direction and determining the maximum wire size of the warp and woof wires which will produce a maximum woof crimp angle which will not permit the woof wires to slide relative to the warp wires in the woof direction, and determining the length of the openings in the warp direction which will produce a substantially maximum warp crimp angle which will not permit the warp wires to slide relative to the woof wires in the warp direction.

Abstract: The application describes a particle size analyser comprising a horizontally held close-coiled helical spring which is partly filled with the powder under test. The operation of the technique involves stretching the spring to various known lengths and vibrating it in the lateral direction at or around its first harmonic resonant frequency with a low amplitude of vibration. Measurements of the mass of the powder discharged from spring coils for a given spring extension and relating the latter to the particle size of the discharged powder by reference to a previously generated calibration curve provide data on the particle size distribution.

Abstract: The present new, improved rock screed bucket has a solid rectangular back plate together with a framework having a rectangular bottom and a pair of generally triangular shaped sides. The solid rectangular back plate acts as a backstop. The rectangular bottom supports a heavy duty grading screen. A mounting frame is mounted to the rear of the solid rectangular back plate through a plurality of shock absorbing spacers. The conventional arm structures and conventional hydraulic system of a conventional tractor or skid loader connect to the mounting frame. By rapidly moving the conventional arm structure and conventional hydraulic system any material in the rock screed bucket can be shaken and thus screened. In a second embodiment, a hydraulic shaker may be attached to the top of the rock screed bucket to shake the rock screed bucket. The hydraulic shaker is conventional and derives its power from the conventional hydraulic system of the tractor or skid loader.

Abstract: A paper-making screen apparatus for separating foreign matters from paper-making raw materials is formed of a screen having a first annular end plate located at an end; a second annular end plate located at the other end thereof, having a plurality of openings for male screws; a plurality of interval keeping members secured to the first and second end plates to keep an interval therebetween, and having female screws on the side facing the second end plate; a plurality of male screws engaging the female screws; and a plurality of rod-shaped members connected to the first and second end plates, and annularly arranged parallel to each other at certain intervals.

Abstract: Optimized utilization of combinations of fluid catalyst magnetic separator, classifier, and/or attriter can be used to achieve lower catalyst cost, and better catalyst activity and selectivity through control of metal-on-catalyst, particle size and particle size distribution. This process is especially useful when processing high metal-containing feedstocks. This provides a catalyst recovery unit (RCU.TM.) ancillary to an FCC or similar unit.

Abstract: An arrangement in grading and cleaning machines with a screen (15). The screen is associated with at least one sensor (24) in the flow of material passing through the screen for generating electric signals in dependence on material particles leaving the screen as throughput and impinging on the sensor. The sensor is operatively connected to be adjusted (26) through a function circuit (25) for the control of various operations parameters of the screen (15) in dependence on the impingement intensity to achieve a throughput according to a predetermined mathematical model.

Abstract: A dynamic separator for a grinding mill having a stator installed in a stationary manner and a rotor provided on a rotary shaft such that it faces the stator. Between the stator and the rotor is provided a small gap for the passage of processed material in order to separate and discharge the processed material from the dispersion media. The rotor is arranged and configured together with the stator such that the relative position of the rotor rim area and the stator are constantly varied.

Abstract: A raw refuse processing apparatus disk screen separating bed has a series of interdigitated rotatable disk assemblies and is adapted to receive raw refuse at one end, including bagged refuse, and at an intermediate location along its length the separating bed is provided with a bag breaker arrangement comprising a floating carriage having bag delaying disk assemblies and overlying bag ripping disk assemblies of the separating bed.

Abstract: A method for separating the alkaline ore and spent carbon fractions contained in spent electrolytic cell cathode comprising the steps of:(a) grinding the spent cathode to a suitable particle size;(b) treating the product of step (a) with ultrasonic energy, sulfuric acid, or both, for a period sufficient to achieve a measurable particle size distinction between the alkaline ore and carbon particles; and(c) screening the alkaline ore and carbon particles to achieve separation of the alkaline ore particles which pass through the screen from the carbon particles which are retained on the screen.

Abstract: A method and apparatus for separating particles suspended in a liquid from the liquid. A flow of the liquid is passed through a filter bed of ferromagnetic bodies which acts as a coarse filter to trap the larger particles in the flow. The filter bed is arranged within a truncated cone between the poles of an electromagnet. To cleanse the bed and flush out the trapped particles a wash liquid is passed through the bed and the electromagnet is energized to levitate the bed to thereby allow the wash liquid to remove the particles. The liquid flow from the coarse filter can be passed to a high gradient magnetic separator at which remaining small particles in the flow are filtered magnetically.

Abstract: In a method of and assembly for sorting a granular two- or multi-component mixture, containing a number p of granular, polydisperse solid components to be sorted out the particles of which differ in density and/or shape and have at least partially overlapping particle size and settling rate (particulate characteristics) distributions the mixture, in which the components are present sortable, is subjected to two dry classification steps in which different particulate characteristics of the particles are decisive.

Abstract: The method consists of subjecting said muds to a particle size grading to concentrate the lead and zinc contained notably in the fines, and recovering said fraction containing the lead and the zinc, the other fraction being recyclable to the blast furnaces. The invention is useful in the preparation of feed materials for Waelz-Berzelius furnaces.

Abstract: In a disk screen apparatus of the type having a series of corotating shafts, each of which has a longitudinal series of concentric screen disks which mesh with the screen disks of the adjacent shafts, the screen disks are carried by tubular modules mounted in end-to-end relation on the shafts. Each module comprises a tubular hub having a set of centrally apertured screen disks concentrically mounted in radially extending relation on the hub, which projects through the central apertures of the disks, the disks being attached to the hub in substantially accurately spaced relation to one another axially along the hub. A method is provided for making the modules, and also for making a disk screen apparatus embodying the modules.

Abstract: The invention concerns a method for optimization of the coal slurry dewatering process. Through a regulation of the fine grain content, it is possible to keep the filter cake at a constant level and thus to maximize the dewatering process. A separation of the slurry into a predominantly relatively fine grain fraction and a relatively coarse grain fraction, with the division point being between about 0.03 and 0.15 mm, is carried out, with a formation of a coal agglomerate from the fine grain fraction, and a dehydration of both the coarse grain fraction and the coal agglomerate from the fine grain fraction.

Abstract: The method consists of subjecting said muds to a particle size grading to concentrate the lead and zinc contained notably in the fines, and recovering said fraction containing the lead and the zinc, the other fraction being recyclable to the blast furnaces. The invention is useful in the preparation of feed materials for Waelz-Berzelius furnaces.

Abstract: A sieving device comprises a sieve with an electrical linear device mounted in spaced apart relation from the mesh of the sieve. Particles supplied to the side of the mesh away from the thrust device are caused by the thrust device to move across the mesh and those which are smaller than the mesh pass through the mesh and towards the thrust device. Conveniently a plate is disposed between the mesh and the plate. Particles passing through the mesh then come into contact with the plate and move along it under the influence of the thrust device.

Abstract: The titanium and zirconium-based minerals, present in the first stage centrifuge tailings from the hot water process for extraction of bitumen from bituminous sands, may be concentrated by a dry screening process. The tailings are burned off to provide a dry, essentially carbon-free, mineral mixture. By screening the mixture into three streams of different particle size range, silica and clays may be rejected as coarse and fine materials respectively, while titanium and zirconium minerals may be concentrated in the intermediate stream. The titanium and zirconium concentrate stream may be advanced to high tension and magnetic separation steps known in conventional processing of heavy minerals, for further beneficiation.

Abstract: Sieve analysis and fineness modulus of particles are adjusted in bulk, without breakdown into size fractions and reblending to tailor a feed product for a given application such as asphalt sand or concrete sand by adjusting the rate of largest size cut and smallest size cut removal in a way to modify the distribution of intermediate fractions.

Abstract: An improved system for the production of digested pulp from wood chips and knots which includes a separating apparatus, connected to the digester output, capable of separating knots from partially cooked wood chips and fibers at the digester pressure and consistency. The separated fibers and fiber bundles pass to a refiner where the fiber bundles are mechanically reduced to fibers in a liquid environment at a high consistency and at the digester pressure. The knots are then re-cycled to the digester or other processes.The separating apparatus above uses a plurality of rotating members such as intermeshing screws or grooved rolls, arranged in a vertical screen to separate an inlet chamber from an outlet chamber. Knots cannot pass through the rotating members and thus are driven out of an outlet which communicates with the inlet chamber. The fibers, however, do pass through the rotating members to the outlet chamber and exit therefrom by a second outlet.

Abstract: A screen with a solid arylene sulfide polymer-polytetrafluoroethylene coating is provided that is suitable for use in a solids separating device. The poly(arylene sulfide)-polytetrafluoroethylene coating provides efficient passage of semi-solid or gummy material across the screen surface thereby reducing the chance of blinding the screen. Method of separating drilling mud.

Abstract: A sieve unit, particularly for spherical nuclear fuel particles, in which the particles are fed to a bed of spheres disposed in layers on a mesh screen to provide, when efficiently packed, an effective pore path of a diameter not greater than that of the mesh screen and means are provided for vibrating the unit so that the spheres are efficiently packed.