Abstract: A method comprises: directing, using an objective and a first reflective surface, first autofocus light toward a sensor, the first autofocus light reflected from a first surface of a substrate; preventing second autofocus light from reaching the sensor, the second autofocus light reflected from a second surface of the substrate; and directing, using the objective and a second reflective surface, emission light toward the sensor, the emission light originating from a sample at the substrate.

Abstract: A discharge grate assembly in a discharge end wall system in a mill shell of a grinding mill. The mill shell defines a mill shell chamber in which a charge including grinding balls and ore-bearing rocks is positioned. The mill shell is rotatable about a central axis thereof for comminution of the ore-bearing rocks to form the grinding balls into worn grinding balls and to produce a slurry including liquid and worn rock pieces from the ore-bearing rocks. The discharge grate assembly includes a body with elongate apertures therein, each aperture extending between a first end thereof and a wider second end thereof. The first and second ends of the aperture are partially defined by respective first and second end walls that are at least partially rectilinear, for impeding the worn grinding balls and the worn rock pieces from lodging in the aperture.

Abstract: A screen system for screening a mixture of particulate materials includes a support frame configured for receiving a plurality of modular and replaceable screen panels. Each screen panel defines a plurality of apertures that extend along a vertical direction through the screen panel and a plurality of insert recesses that are positioned around the plurality of apertures. One or more ceramic aperture inserts are positioned within the insert recesses such that the screen panel and the ceramic aperture inserts define a screening surface, and wherein each of the plurality of apertures in the screening surface are at least partially defined and surrounded by the ceramic aperture inserts.

Abstract: Screening media to screen oversized material includes a main body and a plurality of openings extending through the main body between an upward facing contact face and a downward facing bottom face. A textured pattern is provided at the contact face to provide a roughened surface for the partial entrapment of material fines. Such a configuration protects the screen media from aggressive contact with the material to be screened and provides a bedding layer that is maintained by material-on-material attrition during bulk material flow over the media.

Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.

Abstract: A disclosed screening apparatus includes a subgrid, and a screen element attached to the subgrid via laser welding at a plurality of attachment positions such that, under vibrational excitation, the screen element has a pre-determined profile of vibrational motion relative to the subgrid. The screen element may be attached at a maximal number of attachment locations to the subgrid to minimize relative motion of the screen element and the subgrid under vibrational excitation, or the screen element may be attached a sub-set of the maximal number of attachment locations to allow vibrational motion of the screen element relative to the subgrid. A disclosed method may include attaching a plurality of screen elements to a respective plurality of subgrids, attaching the plurality of subgrids to one another to form a screening pre-assembly, and cutting edges of the screening pre-assembly to form the screen assembly having a perimeter with a pre-determined shape.

Abstract: Screening media is arranged to screen oversized material, the media having a main body and a plurality of openings extending through the main body between an upward facing contact face and a downward facing bottom face. A textured pattern is provided at the contact face to provide a roughened surface for the partial entrapment of material fines. Such a configuration protects the screen media from aggressive contact with the material to be screened and provides a bedding layer that is maintained by material-on-material attrition during bulk material flow over the media.

Abstract: A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.

Abstract: A gutter guard for retaining a gutter and for covering an opening of the gutter provided. The gutter has a front wall and a rear wall and the opening is defined by a top edge of the front wall and the top edge of the rear wall. The gutter guard includes a front portion for operatively engaging the front wall of the gutter, a rear portion having an upwardly and rearwardly extending hook member for retaining the rear wall of the gutter and an upstanding member fastenable to an upstanding support structure, and a central portion extending between the front portion and the rear portion and having a plurality of throughholes formed therein. The gutter guard may be multi-layered, having a first sheet member and a second sheet member that are spaced apart and having non-aligned throughholes. A gutter guard kit can include at least one gutter guard and a gutter that are operatively engageable with one another.

Abstract: A gutter assembly comprising a gutter cover and a gutter cover for covering an opening of a gutter having a front wall, a rear wall and a bottom wall defining a gutter channel, the gutter cover comprising: a front portion operatively engageable with the front wall of the gutter; a rear portion operatively engageable with the rear wall of the gutter; a central portion extending between the front portion and the rear portion and having a first panel and a second panel, the first panel extending above and spaced apart from the second panel, the first panel having a first set of throughholes and the second panel having a second set of throughholes being at least partially offset from the first set of throughholes.

Abstract: According to one aspect there is provided a screen assembly for a vibrating screening machine. The screen assembly comprises a screen chassis and a screen for screening material such as a solution containing liquid and solids. The screen chassis comprises a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened. The screen is attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face. The screen chassis may be made of a light-weight, stiff material. The screen may be made of a durable material such as metal. A method for making a screen assembly is also provided.

Abstract: A magnetically retained screen assembly for a conveyor for processing goods is disclosed. The magnetically retained screen assembly includes one or more magnetic screens and one or more magnet assemblies, wherein the one or more magnet assemblies are configured to magnetically retain the one or more magnetic screens within the conveyor support structure.

Abstract: An agricultural harvester includes a grain processing section having a sieve assembly. The sieve assembly includes right and left frames interconnected by a cross member. The cross member has end castings securable to the right and left frame members. An elongated U-shaped sheet metal member extends between the castings. An elongated slot at each of the U-shaped sheet metal member terminates in a circular hole. The slot and circular hole accommodate variations in forming tolerances for the U-shaped sheet member and dissipate stresses.

Abstract: A screening apparatus 10, including a plurality of elongate beams 11, a plurality of screen panels 14 mounted to the beams to form a broad screening surface, each of the panels 14 being generally square or rectangular and the panels 14 being mounted adjacent to each other so that facing side edges of adjacent panels 14 are in close facing relationship. Each panel 14 being mounted to a pair of beams 11 along opposite side edges to bridge between two adjacent beams11. The panels 14 being mounted to the beams 11 by elongate fixing members 13 that extend in the longitudinal direction of the beams 11 and that are fixed to an edge of the beams 11 and that engage opposite side edges of the panels 14. The fixing members 13 are fixed to the edges of the beams 11 by projections 24, 25 that are spaced apart longitudinally of the fixing members 13 and that extend into openings 18, 19 provided in the edge of the beams 11.

Abstract: A sieving apparatus includes first and second sieving portions. The first sieving portion includes a sieve with a plurality of elongated holes or slits for separation of an object to be sieved based on difference in cross-sectional diameter. The second sieving portion with a sieve constituted by a porous plate includes round holes for separation of the object that has passed through the elongated holes or slits based on difference in aspect ratio. The second sieving portion is employed after sieving by the first sieving portion. A diameter of the round holes in the porous plate constituting the sieve included in the second sieving portion is longer than an opening width in a shorter direction of the elongated hole or the slit of the sieve included in the first sieving portion.

Abstract: A method, apparatus, and system for a solar-driven bio-refinery that may include a entrained-flow biomass feed system that is feedstock flexible via particle size control of the biomass. Some embodiments include a chemical reactor that receives concentrated solar thermal energy from an array of heliostats. The entrained-flow biomass feed system can use an entrainment carrier gas and supplies a variety of biomass sources fed as particles into the solar-driven chemical reactor. Biomass sources in a raw state or partially torrified state may be used, as long as parameters such as particle size of the biomass are controlled. Additionally, concentrated solar thermal energy can drive gasification of the particles. An on-site fuel synthesis reactor may receive the hydrogen and carbon monoxide products from the gasification reaction use the hydrogen and carbon monoxide products in a hydrocarbon fuel synthesis process to create a liquid hydrocarbon fuel.

Abstract: A screen panel with improved apertures for mining and quarrying industries adapted to be mounted on a screen deck, including a screening surface made up of materials such as herein described formed on a reinforcing frame, said screen panel having suitably designed apertures for allowing materials to pass through, said apertures having resilient ribs (5) with protrusions (4) on both sides configured with respect to each other such that adequate open space exists, whereby clogging of materials pursuant to screening operations are substantially reduced.

Abstract: A screen panel for mining and quarrying industries adapted to be mounted on a screen deck including at least a screening portion having one or more rider bars and a bottom reinforcement portion, the screen panel being designed such that the rider bars are adapted to be replaced from the screening portion as and when required. The rider bars are attached to a portion of the screening portion and/or the reinforcement portion by button type snug fitting.

Abstract: A screen panel for mining and quarrying industries adapted to be mounted on a screen deck, including a screening surface made up of materials such as herein described formed on a reinforcing frame, said screening surface having suitably designed apertures of desired shape for allowing materials of desired size to pass through, said apertures having walls (2) made of abrasion resistant material such as herein described, whereby retention of said desired shape of said apertures is ensured for a substantially long period of time.

Abstract: An impact screen cloth for use in a screening device for screening out oversize objects in a material flowing in a direction is provided, comprising a metal plate having a perimeter and comprising a plurality of openings therethrough and forming a grid having longitudinal ligaments substantially parallel to the direction of the material flow and transverse ligaments substantially perpendicular to the direction of the material flow; and a number of longitudinal wear bars positioned on an equal number of longitudinal ligaments to cover a substantial portion of the number of longitudinal ligaments without substantially interfering with the openings.

Abstract: A screen has a plurality of flattened wires. The wires are arranged longitudinally in a first direction, and of those wires there are first and second flattened wires are spaced a predetermined distance from each other or contact or appear to contact each other at spaced intervals to form a polygonic spacing to form a desired screen spacing. The deviation from the desired screen spacing is equal to or less than the standard industry tolerance as established by ASTM E2016-11, table 8. A first and second polymeric support member homogenously encase, respectively, a first and second limited selected portions of the plurality of flattened wires spaced apart. There is no additional metal material in, within, or on the first or second polymeric support members, and the desired screen spacing is maintained even when the first and second polymeric support members are applied and cured.

Abstract: A screen panel with wear protective apertures for mining and quarrying industries adapted to be mounted on a screen deck, including a screening surface made up of materials such as herein described formed on a reinforcing frame, said screening surface having suitably designed apertures of desired shape for allowing materials of desired size to pass through, said apertures having walls made of abrasion resistant material such as herein described said walls having plurality of slits(1) cut along the vertical as well as horizontal line in the top and bottom portion of the apertural walls, whereby utmost flexibility of the apertures is ensured simultaneously ensuring wear protection.

Abstract: Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Abstract: A filter screen including a frame having an upstream surface, a downstream surface opposite the upstream surface, a perimeter grating element, and a plurality of inner grating elements extending within the perimeter grating element and forming at least one opening extending from the upstream surface to the downstream surface; a filter element disposed on the upstream surface; and a tension element disposed on the downstream surface. A method of manufacturing a filter screen, the method including forming a frame having an upstream surface, a downstream surface opposite the upstream surface, a perimeter grating element, and a plurality of inner grating elements extending within the perimeter grating element and forming at least one opening extending from the upstream surface to the downstream surface; attaching a filter element to the upstream surface; and attaching a tension element to the downstream surface.

Abstract: A suspension solution filter sieve basket for use in a flue gas desulfurization includes holes which widen in a flow direction of a suspension solution.

Abstract: There is provided a screen frame adapted for use in a shaker to separate solids from liquid/solid mixture and to which woven wire mesh is to be attached, comprising a plurality of intersecting elongate members (12) defining a plurality of openings (10), or cells, wherein at least one protrusion (26) in the form of an elongate rib extends partway across each opening (10).

Abstract: An integrally-rotating cylindrical sieve 1 includes a hollow rotating shaft 2, which a driveshaft 21 is inserted into and fixed to, support members 3 radially extended from the rotating shaft 2, a cylindrical sieve body 4 made from a thin plate with a large number of apertures 5 formed therein, such as punching metal, and coupled with the support members 3, and sieve frames 6a and 6b attached to axial ends of the sieve body 4. The rotating shaft 2, the support members 3, the sieve body 4, the sieve frames 6a and 6b, and the driveshaft 21 are coaxially rotated together. The sieve body 4 is a cylindrical corrugated plate having wave crests and wave troughs arranged along its circumference and has a large number of apertures 5 formed in the corrugated plate. This arrangement improves the sieving efficiency of the granular material and effectively prevents potential destruction and cracking of the granular material, thus enhancing the commercial value of the sieved granular material.

Abstract: A screening apparatus includes beams and screen panels forming a broad screening surface. Each panel is mounted to a pair of beams along opposite side edges to bridge between two adjacent beams. The panels are mounted to an upwardly facing edge of the beams by elongate fixing members extending in the longitudinal direction of the beams. The fixing members engage opposite side edges of the panels and include a pair of projections that extend into openings provided in the edge of the beams. Each projection is engaged by a locking clip to prevent release from the openings. The openings into which the projections extend are of greater diameter than the outside diameter of the projections providing a loose fit within the openings, to allow movement of the fixing rails and the screen panels before the projections are engaged by a locking clip.

Abstract: A screening media for use in vibrating screen devices that fractionize crushed stones or gravel. The screening media is made by extruding a fiber-reinforced rubber or polymeric material to form a strip in a length longer than that needed to make individual screening mats for use in the vibrating screen devices. Screening apertures are then punched in the strip, and the apertured strip is cut into individual mats. The extruded strip includes side portions configured to connect to support structures of the vibrating device. Prior to the cutting step, the apertured strip can be maintained in the form of a coil or a long-length element.

Abstract: The invention relates to a strainer for treating a fibrous material suspension suitable for producing a paper, cardboard, tissue, or other fibrous material web, having a plurality of strainer perforations, the smallest cross-sectional areas of which are approximately of the same size. The sorting effect and the throughput are to be improved such that the cross-sectional areas of the strainer perforations on the inflow side have varying size.

Abstract: A process for charging a reactor with a fixed catalyst bed which comprises at least one annular shaped support catalyst body K, in which, before the charging, fragments formed in the preparation of the shaped catalyst bodies K are removed by screening.

Abstract: A perforated plate for a vibratory sifter, the perforated plate including a base plate comprising a plurality of openings formed therethrough, and a flange integrally formed with the base plate. A method of forming a screen assembly for a vibratory sifter, the method including forming a base plate, forming a plurality of openings extending from a top surface to a bottom surface of the base plate, and forming an integral flange on the base plate.

Abstract: A screen assembly for separating solid materials of differing sizes in a material stream, having a support, and a screen arrangement placed upon the support, wherein the support has at least one seal placed on the support, the seal configured to interface with a mounting surface of a shaking apparatus.

Abstract: The invention relates to a material separator for conveyor systems, in particular for machines processing plastics pellets. A container provided with a covering hood or a lid (2) is provided with a laterally arranged material feed connection (3) and a suction connection (4) arranged laterally above it as well as preferably a closure device (5) arranged at the lower end of the container (5). In the interior of the container (1) a screen (11) extending over the cross section of the container (1) is provided between the material feed connection (3) and the suction connection (4). The container (1) or the container upper edge (9) is beveled on the covering hood side or the lid side according to a flat cut. The screen (11) extends from the region between the material feed connection (3) and the suction connection (4) in the interior of the container in the direction of the lid (2) up to the region of the container upper edge (9) and is preferably bent in a roof-shaped manner.

Abstract: This invention aims to enhance efficiency of a sieve and to greatly improve productivity of a sifting operation. There is provided a sieve comprising a metal plate including long holes, wherein the long holes are plurally provided such that lines extending in length directions thereof cross one another.

Abstract: A screen panel for use in a vibrating screen device. The screen panel has a plurality of in-flow slots and cross-flow slots arranged in a regular pattern to provide enhanced open area for a given slot size.

Abstract: A screen assembly having a support, the support made of composite material, and at least one layer of screening material on the support, the support having openings that are larger at the top than at the bottom (or vice versa) and/or with a base member or member extending across the bottom of the support.

Abstract: A screening module 10 comprises a frame component 12 to be secured to an underlying screen deck, in use. A screening panel 14 is carried by the frame component 12. The screening panel 14 comprises an operatively upper screening surface 16 and a support structure 18 underlying the screening surface 16 with a plurality of spaced protrusions 20 being supported by and standing proud of the support structure 18. Operatively upper ends of the protrusions 20 lie substantially in a plane of the screening surface 16 and the protrusions 20 define a plurality of screening apertures 22 in the screening surface 16.

Abstract: The invention concerns screen panels of the kind used in vibratory screening operations. According to the invention, the screen panels (10) include recycled polyurethane, typically that recovered from worn screen panels. In one particular embodiment in which the panel has an upper, perforated screening section (16.1) for performing a screening action and an operatively lower section (16.2) beneath the screening section, the upper section is of molded, virgin polyurethane and the lower section comprises a reinforcing frame (12) and recycled polyurethane molded about the reinforcing frame. The invention envisages the use of blends of virgin and recycled polyurethane as well as method of manufacturing screen panels and methods of handling worn screen panels.

Abstract: A screening panel 10 comprises a peripheral frame 12 consisting of a pair of mutually laterally spaced side members 14, 16, which are integral with a pair of mutually axially spaced end members 18, 20. The side members 14, 16 and end members 18, 20 define corners of the panel 22.1, 22.2, 22.3 and 22.4 and the peripheral frame 12 where they meet. A plurality of mutually spaced ribs 15 extend across the periphery of the panel 10 to define a screening surface. The side members and end members are rectangular in cross-section, thereby defining substantially flat upper peripheral surfaces 12.1, outer peripheral surface 12.2 and lower peripheral surface 12.3 of the peripheral frame 12 and thus also the panel 10. The panel 10 includes locating recesses 24 provided at or near to the corners 22.1, 22.2, 22.3 and 22.4 of the panel 10. The panel 10 also has separate securing recesses in the form of semi-circular grooves 30 formed in the lower surface 12.

Abstract: A screening machine for a fiber suspension includes a vessel; a rotor disposed within the vessel; and a screen plate positioned in stationary opposition to the rotor. The screen plate includes a plurality of substantially parallel first grooves extending in a first direction and a plurality of substantially parallel second grooves extending in a second direction. The first grooves intersect with the second grooves. The first grooves and the second grooves conjunctively define a plurality of lands and depressions. A plurality of the lands and a plurality of the depressions include a through-hole extending through the screen plate.

Abstract: A screen for a vibratory separator, the screen including at least two layers of screening material, including a first layer and a second layer, the first layer made of a plurality of intersecting first wires, the second layer made of a plurality of intersecting second wires, the first wires including first shute wires and first warp wires, the second wires including second shute wires and second warp wires, certain of the first warp wires aligned with a second warp wire, and/or certain of the first shute wires aligned with a second shute wire. 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 CFR 1.72(b).

Abstract: A perforated plate for a vibratory sifter, the perforated plate including a base plate comprising a plurality of openings formed therethrough, and a flange integrally formed with the base plate. A method of forming a screen assembly for a vibratory sifter, the method including forming a base plate, forming a plurality of openings extending from a top surface to a bottom surface of the base plate, and foaming an integral flange on the base plate.

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 present invention provides a screen system (8) suitable for use in a vibratory screen apparatus (1), and comprising: a screen element (11) and a support frame (12) therefor, as well as novel screen elements (11) and mesh panels (19) therefor, and the use thereof. The screen element (11) consists essentially of a mesh panel (19) provided with first and second elongate support members (22, 23) extending along opposite end portions of the mesh panel (19). The support frame (12) has spaced apart first and second elongate frame elements (13, 14) for engagement with the screen element support members (22, 23) and further elongate frame elements (17, 18) extending there between for supporting the mesh panel (19).

Abstract: The present invention provides a screen for separating materials according to particle size. The screen has a body, a plurality of fingers, and a plurality of rods. The fingers may be integrally formed with the body. The rods are supported within the body and extend within the fingers to provide structural stability.

Abstract: The invention concerns screen panels of the kind used in vibratory screening operations. According to the invention, the screen panels (10) include recycled polyurethane, typically that recovered from worn screen panels. In one particular embodiment in which the panel has an upper, perforated screening section (16.1) for performing a screening action and an operatively lower section (16.2) beneath the screening section, the upper section is of moulded, virgin polyurethane and the lower section comprises a reinforcing frame (12) and recycled polyurethane moulded about the reinforcing frame. The invention envisages the use of blends of virgin and recycled polyurethane as well as method of manufacturing screen panels and methods of handling worn screen panels.

Abstract: A frame over which woven wire mesh is to be stretched and secured to form a sieving screen and which can be used to screen solids from drilling mud recovered from down-hole when drilling for oil or gas. The frame is a rectilinear moulded plastics frame having edge regions by which it is secured in place in a shaker. Within the frame is a plurality of rectilinear windows formed by an orthogonal array of intersecting ribs also of moulded plastics material. Some of the ribs are internally reinforced by rigid metal members which extend orthogonally between hollow box-section members which define a sub-frame for reinforcing the four edge regions of the frame. The orthogonal members are secured at their ends to the sub-frame. The ends of the sub-frame members are joined at the four corners of the sub-frame. In this way not are only the edge regions of the frame reinforced internally but so also are some of the orthogonally intersecting ribs, so as thereby to produce a rigid frame for the screen.

Abstract: A screen cylinder comprising screen slots (3) and accept channels (8) for directing the portion penetrated the screen slots (3) to an accept side (9) of the screen cylinder (1) of the fiber pulp suspension fed into a feed side (10) of the screen cylinder (1). At least one feed side surface (4) is provided between the screen slots (3) and the accept channels (8) comprise at least one first surface (5) of the accept channel (8) and at least one second surface (6). At least a third of the total length of the accept channel (8) is arranged in a direction opposite to a feed flow direction (A) of the fiber pulp suspension in relation to a normal (19) of a tangent (18) of the screen cylinder (1), which is arranged to pass through the screen slot (3).

Abstract: A shaker apparatus including a basket having an upstream side, a downstream side, and two side walls, at least one wedge guide and one support rail disposed on each side wall, and at least one screen assembly. The support rails and the wedge guides may be configured to engage the screen assembly. The screen assembly may have one or more layers of screen mesh mounted on a screen frame. The screen frame may include a first and a second side rail, each having an upstream end, a downstream end, a top surface, and a bottom surface. A slope of the top surfaces intermediate the upstream end and the downstream end may be different than a slope of the bottom surfaces intermediate the upstream end and the downstream end.