Abstract: A snap lock separatory panel and retainer system includes either a screen wire panel with laterally spaced, longitudinally extending locking bars defining a locking profile, or a urethane panel with laterally spaced, longitudinally extending lips or flanges which also define a locking profile. A retainer system is provided for use in securing these panels. The retainer system utilized center retainers that are engagable with industry standard holes in screen stringer rails of a vibrating separating machine. Each center retainer is provided with an array of retainer pins which are spaced to interdigitate with either screen wire tie rod ends or with urethane panel wall recesses to support the screen panel locking bars or the urethane panel flanges adjacent the retainer pins. Locking strips are provided with undercurrent bores that terminate in undercut receptacles. These bores and receptacles are sized to receive center retainer pin shanks and heads.

Abstract: A screen for use in distributing a fluid in a process flow system. The screen provides support, and provides for the ability to clean particulates from the screen. The screen includes profiled wires affixed to a support, where the support provides channels to distribute the fluid over the screen. The support includes spacing to improve the cleaning of particulates from the screen.

Abstract: A vibrating screening machine for grading bulk materials and the like, with a housing and two sidewalls on which at least one screen deck is mounted on which a screen lining is retained, and a drive means to cause the screen deck to vibrate. Via a material feed, bulk material to be screened is fed and via at least one fine-grain discharge, fine-grain bulk material, and via at least one coarse-grain discharge, coarse-grain bulk material is discharged. The mounting points provided on the sidewalls for mounting at least one screen deck are aligned with a defined grid.

Abstract: A screening module retaining assembly 10 includes a body member 12 defining a passage 14. The body member 12 further includes a locating formation 16, associated with a first end 18 of the body member 12, for engaging a screening module to assist in retaining the screening module relative to a screen deck A retaining element 20 is displaceably arranged in the passage 14, the retaining element 20 being displaceable between a first, non-retaining position in which the retaining element 20 is accessible from the first end of the body member 12 and a second, retaining position in which the retaining element 20 is received within the passage 14 and acts on at least a part of the body member 12 for retaining the body member 12 in position relative to a component of the screen deck. A head portion 22 of the retaining element 20 defines a receiving formation 40 for receiving a complementary formation of the screening module to assist in laterally retaining the screening module relative to the screen deck.

Abstract: Apparatuses for screening granular solid particulate material include a generally planar first screen and a second screen. A plurality of apertures extends through the first screen. At least a portion of the second screen is oriented at an angle to the first screen, and apertures extend through a perforated region of the second screen. The second screen includes at least one region configured to prevent at least some particles of solid material from passing through the second screen.

Abstract: The invention provides a screen which has a screen body (12) and a plurality of ribs which extend across the screen body. Screening apertures (118) are defined in the screen body by the ribs. A reinforcing frame (124) is embedded in the screen body, which frame is made of a first plastics material which has a greater density than a second plastics material from which the screen body (12) is made. The frame has keying formations formed therein to assist in bonding between the frame and the screen body.

Abstract: An undulating molded plastic vibratory screen including a base, a plurality of spaced substantially parallel undulations on the base, screen configurations on the undulations, and supporting rib structure within the undulations.

Abstract: A detector for breaks in screens and filters employed in material separators includes a transmitter of RF signals and a receiver of RF signals located to either side of a screen. The separator includes a chamber having a barrier to RF signals with a path through the barrier being defined through the screen mount. The screen mount receives a screen to extend fully across the path.

Abstract: A detector for breaks in screens and filters employed in material separators includes a transmitter of RF signals and a receiver of RF signals located to either side of a screen. The separator includes a chamber having a barrier to RF signals with a path through the barrier being defined through the screen mount. The screen mount receives a screen to extend fully across the path.

Abstract: A method and apparatus for separating material, particularly excavated material is presented. The method and apparatus utilize a releasable and interchangeable screen assembly which is positioned on top of a frame having a slanted grate. The screen assembly includes bar members which traverse the top of the screen and inverted hook members attached to a top surface of the bar members to enable an equipment bucket to engage the inverted hook members in order to lift and move the screen assembly.

Abstract: A device for separating undesirable oblong and/or curved pieces of scrap from a scrap flow or scrap pile with a higher density, such as chill scrap, by means of an oscillating or shaking screen (1) includes a screen base (2) with a plurality of parallel guide bars (4) running in the longitudinal direction and a plurality of separating bars (3) which present openings (3.2) whose longitudinal and transverse cross-sections have different geometric shapes.

Abstract: A screen assembly has been invented which has a base, at least one layer of screening material on the base, and at least one ramp formed in the at least one layer of screening material.

Abstract: Screen panels are disclosed which are adapted to form a portion of a screening cylinder for screening fibrous material. The screen panels are unitary and made of wear-resistant material including a plurality of axially extending grooves on the outer surface of the screen panel, a plurality of slit-shaped screening orifices disposed at the bottom of the axial grooves, at least one support ring extending circumferentially across the surface of the screen panel and integral therewith, and a flange is formed at the sides of the screen panel so that the screen panels can be assembled together without the use of welding.

Abstract: A screen for a vibratory shaker for treating material flowing thereto, the screen in certain aspects having a lower support made of criss-crossed wires which define a plurality of spaced-apart holes through the lower support, the wires having top surfaces with a substantially flat portion, and screening material on the top surfaces of the wires.

Abstract: A screen assembly for a vibratory screening machine including a plurality of superimposed screens, channels on the edges of the screen assembly, and a plurality of hollow plastic channeling strips fused into the plurality of superimposed screens. The hollow channeling strips may have metal rods therein, and the plurality of superimposed screens may be bonded to an apertured plate. A method of fabricating a screen assembly for a vibratory screening machine including the steps of laying a plurality of plastic tubes into grooves of a fixture, superimposing the plurality of screens over the plastic tubes, and applying a heated platen to the screens to thereby cause the plastic tubes to fuse into the screens. The hollow plastic tubes may have metal rods therein, and the plurality of screens may be bonded to an apertured plate before the hollow plastic tubes are bonded to the screens.

Abstract: A screen assembly for a conventional vibratory screening machine includes an upper fine mesh screen which passes particles below a predetermined size and rejects particles above this size. A second or blinding screen, below the first screen, acts to dislodge particles caught in the mesh of the first screen. A load bearing assembly supports the first and second screens and includes a first support screen coarser than the screens above it, a perforate plastic mesh and a second support screen coarser than the first support screen. The assembly is placed in a heated press which softens the plastic and then bonds the screens together. In a second embodiment of the invention, an undulating screen assembly is bonded to a support which comprises one or more screens of coarser mesh.

Abstract: A new screen has been invented for use with vibratory screening apparatuses which has, in certain aspects, a base, a first screen on the base, and a scalping screen on the first screen, the first screen assembly including a corrugated screen having alternating crests and valleys, and the second screen assembly secured to the crests of the corrugated screen, and cushion members disposed between the first and second screen assemblies, the corrugated screen of the first screen assembly having first end openings beneath valleys on two sides thereof, and end plugs within the first end openings to sealingly close off the end openings to fluid flow. The present invention has other embodiments disclosed herein from. A screening apparatus or shale shaker and methods of their use have been invented that use such screens.

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: A sorting apparatus includes a first grating of spaced parallel bars and a second grating of spaced parallel bars positioned parallel to the first grating. Relative lateral movement of the first grating and the second grating alters the lateral spacing between the parallel bars of the first grating in relation to the parallel bars of the second grating. This enables rocks to be sorted into three piles; a first pile of rocks that will pass through when openings in the first grating and second grating are out of register, a second pile of rocks that will pass through only when openings in the first grating and second grating are in register, and a third pile of rocks that will not pass through.

Abstract: A substantially planar screen for a solid particle separator is formed from one or more layers of mesh. The one or more layers of mesh are formed into a series of ridges separated by channels within the plane of the screen. The wire mesh is bonded to a rigid or semi-rigid panel having a plurality of relatively large openings as compared to those of the mesh to create a plurality of repairable screen cells. The support panel is formed with or bent into a series of alternating ridges and channels to create the ridges and channels in the wire mesh when it is bonded to the panel. The cross-sectional shape of the ridges are generally triangular to maximize exposure of surface area of the screen to a flow of material to be separated. Flat surfaces on the ridges and in the channels facilitate repair of screen cells with solid plugs.

Abstract: A doughnut or puck-shaped spacer has a centrally positioned square hole. A pie-shaped cutaway portion of the spacer allows the spacer to be elastically deformed mounting on a square rod. The rod and spacers join together the bars of a bar screen rack. Bars making up a screen bed are approximately one-quarter inch thick and cantilevered sections of the screening bars benefit from being joined together to control the spacing of the bars and to add rigidity to each rack of bars which makes up the bar screen rack. For ease of assembly, canted slots receive a square rod. The spacers are readily positioned between legs on the square rod. The individual bars are then joined by tightening a nut at the threaded end of the rod, clamping the bars in spaced parallel relation.

Abstract: A screen assembly for a vibratory screening machine including a plate having openings therein, a plurality of screens firmly bonded to the plate, channels on the edges of the plate, and a plurality of hollow plastic channeling strips fused into the plurality of screens. A method of fabricating a screen assembly for a vibratory screening machine including the steps of firmly bonding a plurality of screens to a plate having openings therein, laying a plurality of plastic tubes into grooves of a fixture, superimposing the plurality of screens bonded to the plate over the plastic tubes, and applying a heated platen to the plate and the screens bonded thereto to thereby cause the plastic tubes to fuse into the screens.

Abstract: Culling device for vacuum cleaners and other equipment which is made either as uni-functional (1) or two-functional (16), a part of which enclosure (6) is most frequently made of transparent materials, the device itself being made as tube, handle, part of handle or a specially constructed device which is inserted into the conveying tunnel of a vacuum cleaner (suction pipes), or similar devices. Inside the culling device there are waveformed paralell teeth (4) on a moveable axle (9), so-called culling comb (2), which by an external actuating mechanism (13, 24, 14, 5) is either adjusted so that:a) it rises diagonally into the air path and arrests articles which are carried into the culling device, while they are inspected and, as the case may be, removed (uni-functional culling device), or sucked or otherwise collected into a special collecting compartment (two-functional culling device), orb) it lies down and allows passage for the articles into the vacuum cleaner's accumulation case (its dustbag).

Abstract: A screen assembly for a vibratory screening machine including a frame, and a screen cloth on the frame having wires with a diameter D of between about 1.6.times.10.sup.3 micrometers and 17.8 micrometers with a peak to valley roughness R in micrometers which is between about R=0.333D and R=0.05D. A screen cloth for mounting on the frame having a range of dimensions as set forth above. A method of making a screen for a vibratory screening machine including the steps of providing a screen cloth having a wire of a diameter D of between about 1.6.times.10.sup.3 micrometers and 17.8 micrometers and roughing the surface of the wires to a peak to valley roughness which is between about R=0.333D and R=0.05D.

Abstract: A die stamp formed disc construction including a toothed plate and a two-stepped sleeve integrally formed thereon. The sleeve has coined or stamped interior and exterior forty-five degree flats. The flats are accurately positioned so that, with the discs received through their central openings and clamped together onto the rotation shaft, the interior flat of one disc is held directly against the exterior flat of the adjacent disc thereby accurately and consistently positioning and holding the toothed plates of adjacent discs in spaced relation and preventing disc wobble.

Abstract: An apparatus is described which separates small solids from process waste water. A continuously rotating elongated drum screen having a large diameter interior flow channel removes the solids. The drum screen contains a continuous loop of closely spaced link members each having a foot at one end projecting towards the interior of the drum chambr. Pivot members are connected to the links and these pivot members are driven by lugs attached to an endless loop chain. The chain is driven by variable speed motors. A flushing system mounted on top of the drum screen washes solids into a hopper where liquid is returned to the drum inner chamber and solids are sent to solid waste disposal.

Abstract: A screen or grid adapted to be placed in close proximity to the receiving end of a trash receptacle housed within an enclosure which permits smaller dimensioned trash to pass through openings in the screen or grid but will prevent larger dimensioned reusable objects, such as food carrying trays, from being mistakenly or inadvertently disposed in the trash receptacle.

Abstract: A flat element for filtering various substances and separating particles wherein a wire is planarly wound in the form of a vortex to form a vortical slit between the adjoining peripheral margins of the wire thereby increasing the area for filtering or separation treatment as so-called linear treatment holes to the utmost to improve the filtering or separation efficiency.

Abstract: The invention comprises a screening device for separating fine particles from a stream of air and a particulate mixture containing coarse and fines which includes a box-like hollow housing tilted downwardly at an acute angle. The housing contains a plurality of elongated screening elements and an air cleaning device consisting of a blowpipe and a series of nozzles directed at the screening elements through Venturi tubes. At periodic intervals a jet or pulse of air is injected into the Venturi tubes to reverse air flow and rid the screen elements of adhered coarse particles. Substantially complete fines removal can be achieved by employing a recycling loop between the coarse particle outlet and inlet of the housing.

Abstract: An elastomeric element for forming surfaces engageable with loose abrasive materials comprising a base having a working surface in the form of a surface of revolution. In a section taken perpendicularly to the axis of the surface of revolution the base is fashioned as a sector of a ring. A sizing screen from the elastomeric elements has secured on a frame thereof a plurality of elastomeric elements with a plurality of holes made therein. Each elastomeric element is secured by the attachment means on the frame of the sizing screen to form a substantially flat working surface.

Abstract: A molded polyurethane vibratory screen including a body having opposite side edge portions, upper and lower edge portions, an upper surface and a lower surface, a plurality of major and minor substantially parallel ribs extending between the upper and lower edge portions and substantially parallel to the side edge portions, dividing strips extending between the major and minor ribs to define screen openings therebetween, aramid fibers extending between the side edge portions and through the dividing strips to provide tensile strength to the dividing strips, and upper triangular cross section portions formed integrally with the major and minor ribs and extending above the upper surface of the screen to direct foreign matter laterally toward the screen openings. The dividing strips are preferably in the cross-sectional form of an inverted trapezoid, or in a form having an upper portion in the shape of an inverted trapezoid and the lower portion in the shape of a rectangle.

Abstract: A molded polyurethane vibratory screen including a body having opposite side edge portions, upper and lower edge portions, an upper surface and a lower surface, a plurality of major and minor substantially parallel ribs extending between the upper and lower edge portions and substantially parallel to the side edge portions, dividing strips extending between the major and minor ribs to define screen openings therebetween, aramid fibers extending between the side edge portions and through the dividing strips to provide tensile strength to the dividing strips, and upper triangular cross section portions formed integrally with the major and minor ribs and extending above the upper surface of the screen to direct foreign matter laterally toward the screen openings.

Abstract: An apparatus is described which separates small solids from process waste water. A continuously rotating elongated drum screen in a three foot diameter flow channel removes the solids. The solids are deposited by spray wash into a dewatering chamber. The screen components include row of closely spaced links and pivot members connected end-to-end to form a continuous loop mounted within a frame driven by a variable speed motor.

Abstract: A grain harvesting combine is provided with an improved sieve plate for more efficient cleaning of the grain. The sieve plate is mounted on the combine adjacent the rearward end thereof and is substantially rectangular in shape. The sieve plate has forward and rearward edges and opposite side edges, the forward edge and side edges being substantially coplanar. The sieve plate also has a forward portion which slopes downwardly from the forward edge and terminates in a substantially flat portion extending rearwardly to the rearward edge. Inclined opposite side portions are also provided which slope downwardly from each side edge to the flat portion of the sieve. The degree of incline of the forward portion and side portions is approximately 5.degree. from the flat portion. The inclined side portions minimized grain loss when the combine is operating on sloping terrain.

Abstract: Screen member for use in fixed or rotating screen support devices and in either a vibrating or non-vibrating mode for grading or dewatering comprises a first plurality of elongated, parallel surface wire members which are formed by extruding a resilient, abrasion resistant layer of elastomeric material completely around a core portion which is more rigid than the elastomeric layer. A second plurality of elongated, parallel support rod members arranged transverse to the first plurality are also formed by extruding a layer of elastomeric material completely around a more rigid core portion. The first and second plurality of wire members are bonded to each other at every intersection by a partial melting together of the contacting elastomeric layers under pressure.

Abstract: A device for primary separation of valuable ore material from gravel or other waste in placer mining prior to sluicing. The separator comprises a frame having sides and front and back ends and adapted to be inclined at an angle to the horizontal during operation. A material entrance is provided at the elevated end. A screen comprising a plurality of hinged rigid plates, laterally extending across the frame, extends from side to side and front to back of the frame and is supported within the frame. The end of the screen at the elevated end of the separator is secured to the frame. The plates are spaced from adjacent plates a pre-determined distance. Screen distortion means comprising a plurality of spaced rows of rounded projections are mounted on the carriage. These projections bear against the bottom surface of the screen whereby, during operation, they move with the carriage back and forth beneath the hinged plates to create a wave action on the screen to move material across the screen from front to back.

Abstract: A net or screen formed of crossing strands of an abrasion-resisting organic element and a sieve constructed with such netting or screening. The strands may be either cored or coreless. Where a core is provided it may consist of some type of metallic wire, inorganic fibre or organic polimerized elongationless strands, either solid or formed of monofilament or twisted strands. The net or screen is formed by arranging one set of strands in a plane parallel to each other and spaced apart by predetermined distances and placing a second set of strands, spaced at the same or other predetermined distances parallel to each other, transverse to and on the first set of strands. The two sets of strands are caused to adhere to predetermined points of contact by heating to a temperature at which the contacting elastomers fuse to each other. Netting or screening so formed may be employed to construct screening, such as may be employed in sieves, particularly for sifting out finer materials from coarser materials.

Abstract: A sieve screen module comprises a plurality of screen elements whose opposed edges contain complementary formations interlocked by an elongate member fixedly secured in the formation by a settable material. A number of modules may be assembled by passing a rod thru the elongate member.

Abstract: A rubber screen for a vibratory screening apparatus comprises a plurality of first parallel rope members having suitable cross sectional shapes and arranged in a particle flowing direction, each of said first rope members having a tensile member composed of a strand of filament having a high elongation at break and an organic material having flexibility and/or elasticity and covering the tensile member, and a plurality of second parallel rope members having suitable cross sectional shapes and arranged in a direction normal to the first rope members, each of the second rope members having a tensile member of a material having a low elongation at break and an organic material having flexibility and/or elasticity and covering the tensile member, each point of intersection between the first and second rope members being suitably bonded.

Abstract: A finishing device in the form of an annular bowl adapted to house media and parts to be finished and means for imparting vibratory energy to the bowl to cause the media and parts to progress in agitated movement about the bowl, means for unloading the parts without removal of media from the bowl in which use is made of barriers introduced to extend angularly into the bowl with the barriers spaced one from the other across the bowl by an amount greater than the maximum cross-section of the media but less than the cross-section of the parts whereby the parts are retained by the barriers and caused to travel up the inclined barriers while the media continues through the barriers for continued excursion about the bowl.

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 segmented screen body or bottom for classification, screening and washing of fragmented hard stocks employs a multiplicity of segmented elements constructed of elastomer or rubber material which, when abutted and supported in predetermined relations, define sieve apertures of a predetermined size and extending, if desired, in staggered longitudinal rows. The structure further requires a multiplicity of parallel transverse metal wires or equivalent elements which are embedded and extend through appropriate apertured portions of the elastic components. In the preferred form the essential elements include T-shaped and L-shaped elements, all of which may be obtained from identical integral moldings of T-shape and many of which are cut along transverse lines at the T-top to provide from the same moldings complementary L-shaped elements.

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.