Abstract: A screen is described wherein one end of the screen frame is provided with an upwardly open channel profile and the other end with a similar but downwardly open channel profile, such that the outboard edge of an upwardly open profile will fit within the channel of a downwardly open profile provided along the edge of an adjoining screen frame, to enable two such screens to be connected together and to enable linear movement in a direction generally perpendicular to the line of engagement and generally in the plane of at least one of the two screens, to be transmitted from one screen frame to the other. The engagement of one profile by another also serves to close the gap between the two screen frames and prevent at least particulate material from passing therebetween. Preferably the engagement prevents liquid from passing therebetween.

Abstract: A soil screening device includes a screen frame having a screening surface, and a supporting frame. The supporting frame may have rearwardly disposed rigid uprights supporting the screen frame. The screen frame is pivotally mounted to a first upper member mounted at an upper end of the uprights, for pivoting between a lowered position and an elevated position. The supporting frame has a base frame extending forwardly of the uprights. Upper members of the base frame have at least one wedge selectively positionably mounted thereon, for example atop the upper member of the base frame. The wedge or wedges are positionable to engage a lower edge of the screen frame when in the lowered position bearing down on an upper inclined surface of the wedge or wedges. The wedge or wedges are selectively positionable relative to the upper members of the base frame so as to selectively adjust an angular orientation of the screen frame relative to the uprights.

Abstract: A screen assembly for a vibratory separator, the screen assembly including screening material with opposed spaced-apart sides including a first side and a second side, a side mount on each of the opposed spaced-apart sides, each side of the opposed spaced-apart sides having an edge portion, and each edge portion held within a side mount; a vibratory separator with such a screen assembly; and methods of their use.

Abstract: In a cylindrical screen, a screen body has a height greater than its diameter, and is formed of a plurality of portions spaced apart from each other in a direction of the height. Each portion has slits laterally and vertically spaced apart from each other. At least one annular member is situated between two of the plurality of the portions of the screen body to be located radially inside an outer surface of the screen. The annular member has an annular concave formed in a middle thereof extending toward an inner side of the screen from the outer surface of the screen, and a width extending in the direction of the height. The width is greater than a distance of the slits vertically spaced apart from each other. Accordingly, a mat formed on the screen can be easily peeled off.

Abstract: A parts collection system for injection molding machines is disclosed. The system provides for easy and quick changing of devices adapted for receiving molded parts discharged from the molding machine. Generally, the parts collection system of the present invention includes a pair of support tracks for mounting to the frame of the molding machine having a pair of mold member operably connected thereto. Adjustably mounted to the support tracks are a pair of retaining beams for suspending devices adapted to receive parts dropped from the mold members.

Abstract: A unibody structure for a screen assembly for a vibratory separator, the unibody structure, in certain aspects having an integral body member with a portion having a plurality of spaced-apart openings in a pattern of a plurality of spaced-apart screening openings and including a pair of spaced-apart integral side members made of folded portions that form the pair of spaced-apart integral side members, a pair of spaced-apart integral end members made of folded end portions, the pair of spaced-apart integral end members each with a first end member and a second end member, the first end member configured with a shoulder support portion for sealingly abutting a screen ledge end of an adjacent screen, and the second end member configured with a ledge portion for sealingly abutting a shoulder portion of an end of an adjacent screen, and the plurality of spaced-apart openings of the integral body member defined by a plurality of spaced-apart strips, each adjacent pair of the plurality of spaced-apart strips definin

Abstract: A support strip has been invented for supporting part of a screen used in a vibratory shaker, the support strip having a support body having spaced-apart ends spaced-apart sides, and a top surface, and at least one hump, raised portion or upturned finger projecting above the top surface of the support body and a support beneath said at least one hump, etc. The support may be entirely beneath the hump, etc. or part thereof may project beyond the hump, etc. The present invention also discloses a variety of screens and screen assemblies with such structure.

Abstract: A clamping device for clamping an object to a structure, the device including a lever arm pivotally mounted relative to the structure, at least one member for urging one end portion of the arm in a direction to pivot the other end portion into engagement with the object, and an actuator supported by the housing and adapted to engage the one end portion of the arm to pivot the other end portion out of the engagement. The device is utilized to clamp a screen to a bed of a separator.

Abstract: A flat sifter with self-supporting structure which is preferably used for sifting grain and flour-like products in mills. The aim is to markedly simplify the construction and assembly of such a flat sifter while improving the sanitary conditions. That aim is achieved by combining one or several double compartments, which are mounted laterally adjacent to one another with a universal drive unit.

Abstract: A shielding device 23, 24, in apparatus 1 for screening ore or like material includes an elongate body portion 25 for location over the top surface 7 of a support beam 3 of a support frame for screen panels 6. The shielding device includes at least one skirt 26 projecting from a side of the body portion 25. The device is locatable between the screen panels 6, a fixing member 13 for the screen panels and the beam 3 and provides a surface 27-27a for collecting fines material that ingresses between the screen panels 6 and fixing member 13 and deflecting it away from the beam 3. Use of the shielding devices reduces wear on the support beams 3 due to the abrasive fines material. The shielding devices are consumable items and can be replaced.

Abstract: A screen panel module for mounting on a screen deck frame for screening, separating and grading materials such as ores. The module comprises a stiff frame component for supporting a resiliently flexible screening surface provided by a panel component. Opposite sides of the panel component include depending flanges having ribs for seating in complementary grooves in sides of the frame component for removably mounting the panel component on the frame component. The module includes means such as ribs, grooves, beads or the like, preferable associated with both the panel and frame components for interengaging with fixing means for locating and fixing the module to a screen deck frame. Whereas the whole of a prior art screen module has to be exchanged when worn, the invention allows the exchange of one component of a module, namely the panel component, which component costs a fraction of the whole module.

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: The invention relates to a sieve frame for plan sifters and also to a method of producing it. It is used mainly in plan sifters for milling. The object is to improve the functionality of an insertable sieve frame and to simplify production.

Abstract: A screen having a frame, three screen cloth layers and a laminating solidified layer with perforations therethrough. The screening layer of the screen cloth is typically of the finest mesh with increasing coarseness to the support mesh. The solidified layer is positioned by placement on the supporting mesh where it is fused to impregnate through each of the screen layers to form surfaces on either side of the lamination. A heat press is employed to so configure the solidified layer. A nonstick sheet between the screening mesh and the heat press molds texture into the surface of the solidified layer for reduced slippage of material being screened on the assembly. The screen lamination is stretched and bonded to a screen frame.

Abstract: A structural mount for a vibrator of a screen separator is provided in which the vibrator mounting plate is secured at an angle directly to the basket side wall structure or to a load bearing structure which is parallel and fixed to the basket side wall structure. In a preferred embodiment of the invention, an opening or pocket is provided in the basket side wall to accommodate protrusion of the inward end of the vibrator into or even through the basket side wall. Access to and removal of the cap from the inward end of the vibrator is accomplished in the former case from the inside of the basket and in the latter case from the outside of the basket. The basket side wall reinforcing structure preferably includes a Y-shaped yoke with the mounting plate being fixed proximate the Y-connection point. Transverse reinforcing members of the basket have their ends fixed to the extremities of the Y-shaped yoke.

Abstract: A screen cylinder, screen, method of manufacture of the screen cylinder, and method of use of the screen cylinder, allow screen capacity to be maximized without sacrificing screen cylinder strength, and while achieving a clean accepts flow. A screen cylinder is constructed in a conventional manner except that at least one reinforcing ring is permanently fastened (typically by continuous or spot laser or electric beam welding, or direct resistance welding) to at least a majority of (and typically essentially all of) the land areas which separate grooves in a row from each other, at the outlet surface of the cylinder, or at least one spiral ring is applied. In this way effective slot length of screen cylinders may be about 65-90% of the total screen length, compared to only about 45-55% for conventional screen cylinders. The screen cylinders are particularly effective in screening cellulose pulps from the pulp and paper industry.

Abstract: A modular deck support framework system employing support tray framework sections for vibrating screens having an essentially rectangular outlined perimeter framework. Each support tray perimeter framework has at least: two opposed side framework members and a square cut cross-angle 50, or notched end angle 62, as a feed end cross framework member; and a square cut flat stock 52 or curved top flat stock 52C as a discharge end cross framework member. Square cut cross-angle 50 is oriented such that square cut cross-angle upper leg 50U is pointing essentially upwards and essentially perpendicular to the flow of particles over support trays, and square cut cross angle lower leg 50L is pointing essentially with the flow of particles over support trays. Notched end angle 62 is oriented similarly whenever employed.

Abstract: A support structure for thin screenplates utilized for fine screens in Fibresaving applications for pulp fiber suspensions or the like wherein a support structure having a screen support in minimum screen contact positioned by a support reinforcement and positioning device, assembled to form an integral structure which reduces the stresses and deflections in the thin screenplates occurring in operation.

Abstract: A screen assembly for a vibrating shaker having a crowned deck for receiving at least one screen assembly thereon and a plurality of attachment members. The screen assembly includes a rigid frame having a pair of parallel, opposed sides and a pair of parallel, opposed ends. An underside of the frame is radiused to match the crowned deck of the shaker. A top planar side of the rigid frame is opposed to the underside of the frame. At least one screen cloth layer is fixed to the planar top side of the frame for separating solid materials from liquids and fine solid particles.

Abstract: A method and apparatus for mounting a panel on a rail member having first and second resilient legs separated by a channel. A groove disposed along a first side of the panel receives a portion of one of the resilient legs of the rail member. The groove extends from a lower surface of the panel toward an upper surface of the panel so that the upper surface extends over the resilient leg received in the groove. The groove includes a first side surface with a first inclined portion and a second side surface with a second inclined portion. The second side surface of the groove is engagable with the inner leg surface of the resilient leg received in the groove to outwardly urge the resilient leg away from the channel of the rail member and toward the first inclined portion of the groove to retain the panel on the rail member.

Abstract: A convertible vibratory material separating apparatus, and kits to convert the apparatus to a woven-screen or finger-rod upper separating surface. The separating apparatus includes a universal shaker head adapted for vibratory movement within a frame with a tall and short end. The shaker head includes side plates and a centerplate, and removable support rails or plates when the shaker head is converted to finger-rod combs for a separating surface. The shaker head includes flanges on a lateral support tube enclosing an eccentric motor driven shaft and flanges when the shaker head is converted to a woven-screen upper separating surface. The kits include right angle flanges, bars and plates for conversion of the shaker head with woven-screens or combs of finger-rods.

Abstract: A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the frame and comprises alternating closed channels and screen rows which alternate across the width of the frame.

Abstract: A materials grinding and processing machine includes a sizing concave having a sizing screen contained therein. Ordinarily, the sizing concave is pivotally connected adjacent its upper end to the frame of the materials processing machine. To replace the sizing screen, a temporary pivotal connection is made between the lower end of the sizing concave and the frame. The upper end of the sizing concave is permitted to swing away from the frame to provide access to the sizing screen from above. A hydraulic cylinder, coupled between the frame and the sizing concave, can be selectively attached at different points on the sizing concave to move the sizing concave and improve access, from above, to the sizing screen.

Abstract: A rapid coupling for a supported, driven shaft is disclosed. The coupling includes a coupling sleeve which is axially slidable over a drive shaft but keyed to the drive shaft to ensure that the coupling sleeve rotates with the shaft. The coupling sleeve has a driven end which includes slots for engaging driven pins affixed to a driven shaft. The coupling sleeve slides over and supports the driven shaft in a coupled position. The coupling sleeve is held in the coupled position by a quick release pin received in a bore through the drive shaft. The advantage is a simple coupling that is easily manufactured, the coupling being serviceable in a very restricted space where the driven shaft must be uncoupled without axial movement of either shaft.

Abstract: A mobile screening apparatus for gravel and other aggregates includes a three sided box adapted to rest on the ground surface. A vibrating screen is located above the box in a tilted, or sloped condition, so that gravel deposited on the screen is in a fluidized condition. Relatively fine gravel particles (stones) pass downwardly through the screen into the box. Two upwardly divergent trough walls are rigidly secured to side edges of the screen to guide gravel particles onto the screen. A rotary motor and counterweight system is mounted on the undersurface of the screen to oscillate the screen in a generally vertical direction. The motor and counterweight system are exposed so as to be readily accessible for inspection or maintenance purposes.

Abstract: A particle screening system is a modular industrial screen system having a number of screen panel modules supported side-by-side and/or end-to-end by a supporting structure assembly. The supporting structure assembly has a number of support bars arranged to support peripheral portions of each screen panel module by way of rail members. The rail members have protrusions which are designed to meet with recesses in the screen panel modules using a snap-engagement.

Abstract: A screen assembly according to the invention screens material by size and includes first and second sets of transversely spaced apart, longitudinally extending first and second members respectively. The members are parallel to each other, and some members of the second set are located between some members of the first set. At least one of the sets is mounted to vibrate along a longitudinal axis to feed material therealong. A plurality of longitudinally spaced apart, transversely extending third members are located between adjacent first and second members so as to define a plurality of screen openings between the first, second and third members. Third members are mountable so as to be out-of-phase with vibrations of at least one of the first or second sets of longitudinally extending members. The screen assembly can be installed in a vibrating conveyor, such that the first members vibrate with a pan of the conveyor, so as to feed material along the first members.

Abstract: A dump platform materials screener includes a horizontally fixed support frame to which is pivotably coupled a materials staging and screening frame. The materials staging and screening frame includes a materials staging area having a bottom region of non-screened material on which may be dumped materials to be screened. A materials screening area adjacent to the non-screened area is provided which extends from the non-screened materials staging area to a first end of the materials staging and screening frame. The materials screening area includes a bottom region including at least one screen having at least a first plurality of openings of at least a first uniform size, for allowing materials to be screened which are of lesser dimensions than that of the uniform size of the plurality of openings to pass through the plurality of openings when the materials to be screened are moved from the materials staging area to the materials screening area.

Abstract: This invention provides a soil conditioning apparatus having a shaker screen assembly that is mounted for operation on the dump bed of wheeled load-carrying vehicles. The shaker screen assembly may be adapted to operate either electrically or hydraulically using available systems on the vehicle and to operate with multiple soil conditioning screens to provide multiple stages of soil conditioning. The conditioned soil materials are deposited directly into the vehicle bed for transport to and dump-delivery at the site or location where it is needed, and this, without having to remove the apparatus from the transporting vehicle.

Abstract: A vibrating screen separator comprising a tuned suspension system for controlling a sifting screen and a resiliently isolated vibrator drive system for efficiently vibrating the screen cloth. The separator may be configured with stacked decks and serially connected sections involving multiple cooperating sifting planes. A rigid frame inclined above a supportive surface suspends the cloth for sifting material. The cloth is tensioned between frame sides by mounting rails, and it overlies a reinforcing subframe. The rails are tensioned by eye nuts externally accessible at the sides of the frame. Material gravitationally flows over the vibrating screen towards the discharge end. The cloth is shaken by an elongated, center strip aligned with the direction of material travel. The center strip is oscillated by the vibrator drive system disposed above it, which is coupled thereto by linkage.

Abstract: Disclosed is a ball cleaner for a screening machine in which the ball cages are presented by a molded plastic insert having integral intersecting longitudinal walls and cross walls. The weight of material being screened on the screen which overlies the insert is not carried by the insert but rather by a separate support beneath it. The support comprises a peripheral frame and joists within the frame which directly underlie at least the longitudinal walls of the insert. The insert completely isolates the frame from the erosive action of the cleaning balls and can be replaced separately from the frame.

Abstract: The invention relates to ore screening machines having longitudinal bucker bars 17 spaced transversely across a screen box with transverse rails 1 spaced longitudinally along the screen box and supported on bucker bars. The transverse rails have a tension member 5 embedded therein which is connected to a C-shaped connecting member 6 at each end thereof. The C-shaped connecting members connect with hook members 7 which in turn connect with a clamp 9 which is secured to each side wall 14 of the screen box to apply tension to tension member 5. The bucker bars and transverse bars forming a grid structure to support screen modules 18 seated on the transverse rails 1 to provide a screen mat extending across the screen box.

Abstract: An apparatus for separating liquids and solids from a mixture thereof comprises a trough structure (12) in which is suspended a filter means (14) on which the mixture can be placed. A vacuum mechanism (16) draws a vacuum beneath the filter means to draw the liquids downwardly from the solids, and a oscillating mechanism (20) causes the remaining solids on the filter to move in a conveying direction. A flexible perforated sheet (60) is provided beneath and in generally continuous contact with the filter means (14) and which can be intermittently flexed to maintain the filter means unobstructed by solids.

Abstract: A rigid, elongated member and cover of resilient, abrasive resistant material which provides protection for the rigid elongated member are adapted for positioning under a sizing screen. The cover protects the elongated member from sand falling through the sizing screen, thus reducing the amount of damage that the falling sand may inflict on the elongated member due to abrasion, erosion, etc.

Abstract: Vibrating screening apparatus in which one or more screen panels are supported between spring-mounted side plates on crosstubes and the several parts of the apparatus are connected primarily by bolting, the crosstubes by U-bolt and tube saddle clamps to framing for attaching the screen panels to the apparatus, the bolted connections by avoiding initial and residual stress and yielding as needed to operational stress imposed by vibrating mechanism of the apparatus, not only enabling the apparatus to operate for extended periods without fracture of parts but, should a fracture occur, permitting and facilitating selective removal of the fractured part for repair or replacement.

Abstract: A horizontal vibrating multi-deck screen apparatus for separating different sizes of materials of generally the same type. The apparatus includes a first or upper screening basket and a second or lower screening basket. The upper screening basket has a feed chute at one end and a discharge chute at the opposite end. Each screening basket has at least one screen deck thereon for conveying and screening material. The two baskets are connected by a spring-type coupling system, including coil springs and fiberglass leaf springs. The two baskets together are supported by known types of support spring systems installed between the upper basket only and a base frame. Hence each basket constitutes one mass and each spring system one spring of a two-mass two-spring system. A pair of shaker motors mounted directly, one on each side, on the lower basket inputs a straight-line sinusoidal exciting force to the system. The exciting force and the spring forces are transmitted to both baskets and induce vibrations.

Abstract: In the case of an apparatus for cleaning grits, which has a plurality of superimposed screen layers, which can be vibrated by means of at least one unbalance exciter and with an inlet or outlet for the product inlet or screen discharge arranged at one end, collecting means with adjustable setting flaps for the screenings, as well as an air circulation through the screen layers over an air distribution chamber in a suction collecting channel adjustable by means of adjusting flaps, it is provided that the apparatus is constructed as a stand with a stand head, a stand base and a vertical intermediate support connecting said two parts, the screen layers being constructed as a dust box and being vibratably supported in the vicinity of the stand base, the stand top being formed by the upper air distribution chamber.

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 screen intended for screening pulp chips or equivalent, wherein two or more screen baskets are fitted one above the other. At least one of these baskets consists of two or more screw spirals journalled to the screen basket, the spiral wings of said spirals being fitted as interlocking in between each other. The outer circumference of each wing extends to the proximity of the mantle face of the core part of the adjoining spiral. The adjoining spirals are opposite-handed and have opposite directions of rotation, their rotation being synchronized in relation to each other, and the distance of the interlocking parts of the wings from each other corresponds to the maximum acceptable thickness of the chips.Two screen baskets fitted one above the other are supported by the frame, and they are connected to each other by units that permit free movement of vibration of one or both of the screen baskets. The movement of vibration is produced by transferring a cam shaft movement from one basket to the other.

Abstract: An improved screen separator which employs orbital motion for the positive removal of solids from liquids, such as drilling mud. A tensioned screen is mounted horizontally at it peripheral edges between parallel side members of a framework. A cushion rail mounted between the side members carries a resilient screen cushion in tight engagement with the screen. The unique screen cushion has an elongated body with a longitudinal slot receiving the lower edge of the cushion rail. The body has diverging sides which terminate at flared lips at each edge of the concave bottom side of the body. The body produces a downward bow in the screen and the bottom side surface conforms precisely to the the bowed screen. As a result, abrasive solids can not be trapped between the screen cushion and the screen. In addition, the body has diverging sides which divert solids from the screen cushion laterally onto the adjacent screen for separation from the liquid being purified.

Abstract: A portable loam screening apparatus includes a nearly-square sloping shaker screen supported by a box-like frame. The frame has a tall end and a short end joined by two sides. Funneling surfaces directed toward the screen are provided along the upper edges of the tall end and the sides. The short end is closed to provide a wall between separated loam and coarse material. A mixture of loam and coarse material is dumped onto the shaker screen from the shovel of an excavating vehicle. The coarse material falls from the lower end of the shaker screen outside of the frame, and the loam passes through the shaker screen to within the box-like frame. The separated loam falls down a sloping table within the frame and can then be retrieved by an excavating vehicle through the open tall end of the frame. A set of wheels mounted to one side of the frame is moveable relative to the frame from an operative position for transporting the apparatus to an inoperative position for resting the frame flush on the ground.

Abstract: A riddle assembly for the grading of particulate materials has a pair of screens forming respective screening stages and disposed one above another. Each of the stages is formed by a pair of longitudinally extending rails interconnected by longitudinally spaced transverse rails having multispan configuration with a pair of outer spans projecting laterally outwardly beyond the longitudinal rails and an inner span interconnecting the two rails and disposed between them. The multispan transverse beams are of nonuniform cross-section corresponding to the distribution of stresses whereby each beam is of uniform strength.

Abstract: A particle screening system is a modular industrial screen system having a number of screen panel modules supported side-by-side and/or end-to-end by a supporting structure assembly. The supporting structure assembly has a number of support bars arranged to support peripheral portions of each screen panel module by way of rail members. The rail members have protrusions which are designed to meet with recesses in the screen panel modules using a snap-engagement.