Abstract: A method and a device for screening aggregates and/or soils with a screening deck, where each point of the screening deck revolves continuously in the same rotating direction along a circular path. This movement is effected by the fastening frame of the screening deck being bearing-mounted upon at least two eccentric shafts, where each eccentric shaft is in turn bearing-mounted on a device body with bearings, through the midpoints of which extends a rotation axis of the eccentric shaft. Additionally, a throw axis spaced from the rotation axis of the eccentric shaft extends through the midpoints of bearings present between each eccentric shaft and the fastening frame, so that when the device is in operation, the throw axis revolves around the rotation axis along a circular path continuously in the same direction. All mass forces of movable structural components have been balanced with respect to rotation axes.

Abstract: According to an exemplary embodiment of the present invention there is provided a catalyst-spreading device comprising: a mesh boat which stores catalyst to be spread on a substrate and includes a bottom having a mesh net, a transportation unit which transports the mesh boat or the substrate, and a vibration unit which vibrates the mesh boat to spread the catalyst on the substrate.

Abstract: An oscillating screen comprises a screening container inside which a screening means is disposed lying on a determinate screening plane (P), coinciding or inclined with respect to a horizontal oscillation plane (X), and oscillation means to move the screening container with respect to a fixed supporting structure. The oscillation means comprises a first movement unit provided with a first rotary shaft associated with a first eccentric element cooperating with the screening container, and a second movement unit having at least a second rotary shaft provided with a second eccentric element cooperating with the screening container. A transmission means connects the first rotary shaft and the second rotary shaft with each other, so that they have the same angular velocity.

Abstract: A vibratory separator for sorting solids including a housing (12) with an inlet (22) for feeding material, a first oulet (24) for discharging undersized particles, and a second oulet (26) for discharging oversized particles; and one or more screens (28) supported in the housing between the inlet and the first outlet wherein undersized particles pass through the screen and exit through the first oulet and oversized particles do not pass through the screen and exit through the second outlet; including the steps of introducing the solids into the housing via the inlet, imparting to the housing a single frequency vibration (20); and converting the single frequency vibration into a sequence of mechanical pulses applied to an interface apparatus by a multifrequency vibratory systems (48), thereby to generate a multifrequency vibration to one or more screens to cause de-agglomeration of the masses to prevent blockage of the one or more screens by particles.

Abstract: A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25-45 &mgr;m and a number average particle diameter of Dp which meets with the following condition: 1≦Dv/Dp≦1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 &mgr;m is at least 70% by weight and particles having a particle diameter of less than 22 &mgr;m is not more than 7% by weight.

Abstract: The invention provides a vibrator assembly (5) having a pair of vibrators (1) held in spaced apart relationship by a frame (10), screen assembly (1), having a screen (2, 3) extending between a pair of side plates (4), is securable between the vibrators (11) to the frame (10). The frame (10) transmits loadings transverse to the side plates (4) directly between the vibrators (11) to avoid undesirable stresses being absorbed by the screen assembly (1).

Abstract: A vibratory separator for separating components of material introduced to the vibratory separator, the vibratory separator including a basket for holding screening apparatus, the basket having two sides spaced-apart by a first end at which the material is introduced into the basket and a second end spaced-apart from the first end, certain components separated from the material exiting the basket from the second end, vibrating apparatus connected to the basket for vibrating the basket, screening apparatus mounted in the basket, the screening apparatus having at least a first portion and a second portion, the first portion lower in the basket than the second portion, and receptacle apparatus below the screening apparatus for receiving material components flowing through the screening apparatus.

Abstract: A vibrating screen supported by springs and vibrated via rotating gear sets. The gears are provided with off center weights synchronized to produce angularly directed vibration for moving the material from end to end on the screen. The gears are lubricated with a bath of low viscosity lubricant which is vibrated to form lubricant spikes that extend into the path of the weights to be propelled by the weights into the gears. The weights are substantially crescent shaped at their leading end to avoid hammer like impact of the lubricant and to thereby reduce heat generation.

Abstract: A vibratory separator having a resiliently mounted housing with a vibratory drive. A screen extends across the housing and a cover is positionable over the screen. The screen includes a discharge port therethrough aligned with a discharge passage for removing material from the top of the screen from the system. Another discharge passage cooperates with a manifold plate extending across the separator beneath the screen. An access port is provided through the cover and arranged to receive a discharge plug which can selectively close the discharge hole through the screen. In operation, separating or dewatering is first accomplished, the energy level of the vibration is reduced and a vacuum is drawn above the screen. Bleed air is allowed into the separator below the screen with a restricted flow so that a vacuum can be drawn. Once the material has dried, the vibrational energy can be increased and the plug removed from the hole through the screen. The process material may then be discharged from the unit.

Abstract: The method and system of the present invention provides for fast, convenient and low cost installation and removal from a particulate screening assembly of an apparatus for protecting the underlying structural members of the screening assembly from the adverse affects caused by the flow therethrough of particulate material. The subject system includes a wear protector system designed for direct attachment to and removal from the structural members which support the screening assembly. This direct attachment and removal operation occurs without the need to detach or disassemble the support structure from the screening assembly. Thus, the wear protector system can be readily removed and replaced without expending substantial downtime in completing system maintenance.

Abstract: A vibratory screening device includes a frame and a screen, supported by the frame, for separating undersize and oversize material. A vibrating device, coupled to the screen includes a first output shaft with an axis of rotation that oscillates relative to the frame. The vibrating device oscillates the screen as the first output shaft is rotated. A driver includes a second output shaft with an axis of rotation that is fixed relative to the frame. The driver rotates the first output shaft. A connector mechanically couples rotational output of the first output shaft to the second output shaft. Preferably, the connector includes a first universal joint, a sliding spline shaft, and a second universal joint. The driver preferably includes an engine, a centrifugal clutch coupled to the first output shaft, a sheave, and an endless belt connecting the centrifugal clutch to the sheave.

Abstract: A sieving device includes a sieve having a base, a drum and a main rim. A screen assembly having a mesh screen and a screen frame extending around a periphery of the mesh screen is resiliently mounted within the main rim. A low frequency vibrational drive vibrates the sieve at low frequencies. An ultrasonic vibrational probe rests on the screen frame free of rigid attachment thereto and vibrates the mesh screen around a periphery thereof. The ultrasonic vibrational drive includes an ultrasonic processor which drives the ultrasonic probe. A probe tip of the probe extends through a side wall of the main rim and rests on a top surface of the screen frame vibrating the screen from the periphery of the screen inwardly to sieve a particulate material. An alternative embodiment has a tab which extends outwardly from the screen frame. The probe tip extends through the sidewall of the main rim and through a sidewall of the drum to abut the tab.

Abstract: A vibratory separator having a resiliently mounted housing with a vibratory drive. A screen extends across the housing and a cover is positionable over the screen. The screen includes a discharge port therethrough aligned with a discharge passage for removing material from the top of the screen from the system. Another discharge passage cooperates with a manifold plate extending across the separator beneath the screen. An access port is provided through the cover and arranged to receive a discharge plug which can selectively close the discharge hole through the screen. In operation, separating or dewatering is first accomplished, the energy level of the vibration is reduced and a vacuum is drawn above the screen. Bleed air is allowed into the separator below the screen with a restricted flow so that a vacuum can be drawn. Once the material has dried, the vibrational energy can be increased and the plug removed from the hole through the screen. The process material may then be discharged from the unit.

Abstract: The subject invention relates to a screening system, preferably a finger screening system, for screening particulate material. The screening system for screening particulate material comprises a screening assembly including a housing. A plurality of screening modules are mounted for direct attachment to and removal from the screening assembly. Each screening module comprises a support block having a front end and a back end and a plurality of rods joined at a first end to the front end of the support block. The second end of the rods are free of attachment and form a row of the rods extending outwardly from the support block. The row of rods define an array of sieve openings of a predetermined size for allowing particulate material up to a predetermined size to pass through the screening module. A plurality of attachment assemblies are also provided for clamping the plurality of screening modules to the screening assembly.

Abstract: A screening machine of the moving base type has an oscillating force reducer and a single counterbalance drive, with the weight of the drive counterbalance sized to underbalance the longitudinal reaction force exerted by the deck on the drive shaft, but to substantially overbalance the lateral reaction force exerted by the deck on the drive shaft. The weight of the force reducer, the spring constant of the spring which oscillates the force reducer, and overall cost are surprisingly reduced.

Abstract: A shale shaker has been developed which, in one aspect, has one or more upper screens and one or more lower screens with an upper screen at a discharge end of the shale shaker and a lower screen disposed to receive material discharged from a discharge end of one of the upper screens. In one aspect a portion of a lower screen underlies the discharge end of the upper screen. In another aspect a solid flowback pan prevents material falling through the upper screen(s) from falling onto the lower screen(s); and, in another aspect, the pan prevents material on a top of the lower screen(s) from falling into a bottom sump of the shale shaker which receives material which has fallen through the screen(s).

Abstract: A garden sieve for a wheelbarrow has a collar frame adapted to conform to and fit loosely on the rim of a wheelbarrow. A sieve frame connected to the collar frame supports a wire screen adapted for sifting granular material. A motor can be connected between the wheelbarrow and the sieve to reciprocate the wire screen. The frame can include a partially removable gate for the removal of strained material and can include roller bearings to reduce friction between the sieve and the wheelbarrow.

Abstract: An apparatus and method for cleaning, desanding, and desilting drilling mud which contains unwanted solids utilizes an enclosure divided into a plurality of compartments connected with a system of vibratory screen shaker separators, desanders, and desilters. Drilling mud is separated by a primary vibratory shaker into coarse solids which is discarded and screened liquid mud which enters a first compartment and is further separated by a desander cyclone into a lighter liquid mud faction and a heavier liquid mud faction. The lighter faction is sent back to the first compartment and recycles, the heavier faction is further separated by a second vibratory shaker and enters a second compartment, and the solids are discarded. The liquid mud from the second compartment is further separated by manifolded desilter cyclones into a heavier faction and a lighter faction.

Abstract: Panning apparatus for separating gold or other minerals or gemstones from soil, gravel or other like materials, the apparatus including a main frame and a secondary frame which supports an upper separating tray assembly and a lower separating pan. The secondary frame is supported for pivotal movement relative to the primary frame and may be oscillated by a motor. A liquid supply tube is arranged to direct water onto the upper tray assembly so that a slurry of materials passes from the upper tray assembly of the lower pan.

Abstract: The screening efficiency of a gyratory screening machine, of the type having a moving base, is significantly increased by mounting to the base a spring/mass system which is tuned so that operation of the machine drive produces amplified movement of the mass along at least one of two perpendicular axes on which the base moves. Movement of the mass reduces the net force on the base along the axis on which the mass oscillates. The reaction force of the machine drive on the base along the other of the two perpendicular axes may be offset by a rotary counterbalance operated by the drive. Movement of the base relative to the ground is thereby reduced, and movement of the screen deck relative to ground is increased. This both increases the effectiveness of the screening motion and decreases the total reaction force transmitted through the base.

Abstract: In a screening machine comprising two screening frames (13 and 31) each having mutual oppositely located feed and discharge ends on which there is arranged an elastic screening lining (54) and which are caused to oscillate by independent oscillating drives wherein the two screening frames (13 and 31) are associated with each other at different heights in such a way that the lower region of the upper screening frame (31) and the upper region of the lower screening frame (13) lie in a common plane, that the elastic screening lining (54) is secured to the two screening frame (13, 31) in the common plane thereof and that the upper screening frame (31) is independently driven in a circular configuration at the feed end and the lower screening frame (13) is indepndently driven in a circular configuration at the discharge end.

Abstract: A material classifying apparatus for separating material into at least overs and fines. The apparatus includes a material receiving housing supporting one or more vertically spaced separator screens. When more than one separator screen is used, the lowermost one of the screens has a finer mesh than the uppermost one of the screens. The apparatus will then further include a discharge opening associated with the periphery of the uppermost one of the screens for discharging overs from the material receiving housing, a discharge opening associated with the periphery of the lowermost one of the screens for discharging product from the material receiving housing, and a discharge opening disposed below the lowermost one of the screens for discharging fines from the material receiving housing.

Abstract: A screening apparatus, particularly for screening valuable materials, domestic garbage, industrial garbage, bulky garbage, dry garbage, wet garbage, compost and/or problematic and dangerous materials, including inclined, open-ended bars capable of oscillatory movement arranged in a transport direction and forming at least two bar grating screens forming a stepped arrangement of bar grating screens with one screen located behind the other in the transport direction. The bar grating screens have bars that are tapered in the transport direction. The apparatus further includes an inlet portion and a preliminary distributor path for feeding in material upstream of at least the upper bar grating screen of the stepped arrangement. A screen frame accommodates the bar grating screens, the inlet portion and the preliminary distributor path. The inlet portion and the preliminary distributor path comprise approximately one third of the entire length of the screening apparatus.

Abstract: Chip screen whose screen basket has been divided into two basket sections (13, 14) that counter-balance each other and that are interconnected and operated by a vertically positioned revolving machine member, e.g. a crankshaft (15). Part (9) of one (14) of the basket sections is located above, and part (12) of it underneath, the center of cavity of the other basket section (13). Both of the basket sections (13, 14) may be supported by means of two support ropes (18, 19), whereby one support rope (18) of one basket section is connected with one support rope (19) of the other basket section by the intermediate of a balance (20) supported by its articulation point (21).

Abstract: Separating equipment having a partially submerged vibratory screen in a screening device wherein oversized particles are induced to flow in a spiral direction outwardly from a central submerged area of the screen. A low velocity inlet manifold is employed centrally above the screen and a spray mechanism directs clearing spray to a peripheral area outwardly of the submerged portion of the screen. The screen is submerged by means of a chamber which extends outwardly above the lower most portion of the concaved partially submerged screen. The preferred embodiments specifically contemplates the screening of water borne wood pulp for the paper industry.

Abstract: Liquid dispersions may be filtered, with a minimum of stopage, to remove coagulum with a pan assembly for a circular vibratory separator comprising a hollow cylindrical frame, having therein a discharge vertically spaced from the bottom of the frame, and a helical ramp commencing substantially in the bottom plane of the frame and travelling about the interior wall of the frame in a circular direction terminating in front of and substantially in the plane of said discharge.

Abstract: Rotary grain cleaning machines are well known. The present invention provides a grain cleaning machine comprising an aspirator unit and a screen unit. The screen unit has an inner frame assembly suspended from an outer frame assembly, inclined screen decks secured to the inner frame assembly and means for causing the inner frame assembly to rotate in a substantially circular path within the outer frame assembly.

Abstract: A vibratory screen separator has cylindrical cleaner elements engaging the lower surface of a horizontal screen with the cleaner elements having a center of gravity offset from their longitudinal axis so that vibration imparted to a supporting perforated surface effects enhanced movement of the cleaner elements. Screen clamp means are pivotally mounted to swing to an external position with respect to a floating tub assembly in which the screen is positioned to permit removal of the screen and a subsequent removal for repair or replacement of a unitary vibrator unit mounted in a housing extending axially below the screen.

Abstract: The vertical cylinder screen in a cleaning machine is adapted to be given a rotary motion at oscillating angular velocity. This is obtained with this invention in that the cylinder screen is adapted to be given an oscillatory motion by means of a driven eccentric unit coupled to it and a rotary motion in that the eccentric unit is mounted on a carrier therefor which is adapted to rotate about the center shaft of the cylinder screen.

Abstract: This invention relates to a flat stroke sifter screen unit having the entire vibratory drive system mounted at the inlet end of the unit including drive springs, input motor (or vibratory excitor) and counterbalance, all located at this end of the screening unit. The outlet end of the unit is free of any bearings, or wheels, or rods, or the like and the entire unit is supported on isolation springs which may be steel coils for a fully free floating mounting.

Abstract: A sifting machine comprising a sieve box (11) mounted on a framework (10), free-swinging on a plurality of suspension canes (12), the framework (10) carrying a motor (13) which drives via belts (16) and pulleys (15, 17), a pair of vertical shafts (18), each carrying a throwing weight system (19, 20, 21) the shafts and their throwing weight systems being mounted outside the bounds of the sieve box (11), and having their mass distributed evenly above and below a horizontal plane passing through the center of gravity of the sieve box (11).

Abstract: A method of determining the phase angle of a vibrating mechanism using line segments of selected angles. The motion of the line segments on the vibration mechanism is observed and the phase angle of the vibratory mechanism is determined using information from the observation.

Abstract: The invention relates to a flat stroke sifter screen having a vibratory excitor mounted at the inlet end and drive springs at the outlet end with a counterbalancing member having a tuning plate and stabilizers for the counterbalance, whereby the lateral vibratory action of the sifter is in the form of an elliptical motion adjacent the inlet end and a substantially straight back and forth, or axial motion is obtained adjacent the discharge end.

Abstract: A screening machine having an improved seal operable between the stationary inlet and outlet conduits of the machine and the movable inlet and outlet ports of the screen enclosure. The improved seal comprises a low friction slideable ring movable relative to a slide surface on one or the other of the conduit or the screen enclosure.

Abstract: In a rotary screen for sorting wood or other particles of a desired size from other particles such as fine, moist, sticky sawdust particles, a plurality of balls are suspended beneath the screening surfaces in a manner such that the gyratory motion of the rotary screen imparts a resonant, pendulum-type motion to the balls, causing them to strike the bottom of the screening surfaces and loosen particles from the screen which would tend to clog the openings therein. The rotary screen includes a collection tray or "dust pan" to catch undersize particles, and a plurality of balls are also suspended beneath the bottom surface of the dust pan to strike it and prevent material build up in the dust pan.

Abstract: An automated wet sieving apparatus and process are provided comprising a wetting liquid distributor which is coupled by eccentric disks to a motor which drives the distributor in an orbital path for supplying the liquid onto a sieve. Means are provided for creating alternating vacuum and pressure below the sieve. The vacuum draws undersized particles whose size is being determined through the sieve and the pressure loosens blinding particles from the sieve. Preferably, the sieve is cyclically tilted as the wetting liquid is being distributed onto the sieve.

Abstract: A sifting and screening mechanism dynamically balanced in all three planes including a base, a screen assembly with an inclined screened frame having a screening surface with an inlet end and an outlet end, a linear bearing, a resilient mount assembly supporting the outlet end of the screened frame on the linear bearing to permit a generally reciprocating motion of the outlet end of the screen frame, a rotating eccentric drive attached to the screen assembly beneath the center of gravity of the assembly to impart a circular motion in a generally horizontal plane to the screen assembly at the center of gravity which, in combination with the linear motion of the outlet end of the screen, creates generally elliptical motion of the screen, a balancing shaft rotatably mounted on the base and spaced apart from the eccentric drive, a belt drive between the eccentric drive and the balancing shaft for maintaining the rate of rotation of the balancing shaft at the same speed as the eccentric drive, and two balance weig

Abstract: A separator of the vibratory type comprising a box assembly of a plurality of planar pan screens resiliently suspended on a support base for vibratory motion thereon by resilient tension springs mounted between the box assembly and surrounding base truss members. The pan screens in the box assembly are formed of cylindrical sleeve frames and a circular screen having an elastomeric ring about its outer periphery with an external rim grooved to receive the lower edge of the superior sleeve frame. The pan screens are assembled into the box assembly by a plurality of tie rods disposed about the outer periphery of the box assembly to axially compress the assembly and screens into position and assure their support of material. The upper edge of each of the sleeve frames is deflected inwardly to telescopically receive the lower edge of the superior pan screen and effect radial deflection of the elastomeric ring of the superior pan screen when the assembly is compressed.

Abstract: A casing, in which a powdered substance to be sieved is fed, is provided with a handle portion containing a battery therein. A supporting arm extends from the inner wall of the casing and is connected with a vibratable motor cover at the center portion of the casing. A motor is mounted within the motor cover, and a weighted member is eccentrically connected to the output shaft thereof. The meshed member of the sieve is connected to the motor cover.