Abstract: There is disclosed herein a beach trash remover which includes a motorized vehicle having a conventional construction type shovel attached to the front thereof. An opening covered by a screen is provided in the center of shovel to allow the beach sand, containing the trash, to drop back onto the beach thereby leaving the trash within the screened opening portion of the shovel. The screen is held on a frame which is coupled to the shovel through shock absorbers and means are provided to provide a vibrating motion to the screened frame to further aid in returning the sand to the beach. A grader may be attached to the back end of the beach trash remover to cover any tire tracks or otherwise smooth the beach.

Abstract: The invention relates to a screen surfacing with exchangeable screen elements fastened juxtaposed, which are fastened on a load-bearing substructure. A plastic profile (2) which engages under the edges of at least two mutually adjacent screen elements (14, 15) is fastened on the load-bearing substructure (1) in the region in which two adjacent screen elements (14, 15) adjoin mutually. A second, upper profile (8) is fastened detachably over this plastic profile (2), and a screen element (14, 15) is retained and clamped between the first and second profile on each of two sides.

Abstract: A method for screening of wooden chips and the similar stuff placed upon a vibrating conveyor including a chute (1) and a frame (2), at which the bottom (4) of the chute (1) is provided with a screening grid consisting of mutually parallel screening rods (6) and is brought to vibrate relative to the frame (2) by help of a vibrating device (11) and at which the frame (2) is provided with longish carriers (9) which are arranged projecting up between the screening rods (6) and the carriers (9), and at which the carriers (9) is brought to vibrate partly relative to the frame (2) and partly relative to the chute (1) with the screening rods. The chute (1) with the screening rods (6) is vibrating in the same plane as the carriers (9) at which the relative movement between the screening rods (6) and the carriers (9) is controlled by a mutual phase displacement of these respectively movement of vibration.

Abstract: A modular screening system which includes a plurality of screening modules supported in an interlocking manner of clamping bars secured to and positioned across a screening machine in parallel spaced relationship. The modules have a peripheral portion defined by side and end walls with a plurality of openings extending through the modules inwardly of the peripheral portion. The side and end walls of the modules are provided with interengaging means which interlock with longitudinal and transverse channels in the clamping bars to secure the modules in position in the machine, the modules are provided with interengaging means whereby the modules interlock together.

Abstract: One end portion of a wire net is fixedly secured to a fixed holder on a base frame of a sieving machine provided with a vibration device, the other end portion thereof is fixedly secured to a movable holder that is provided on the base frame so as to be freely movable, this movable holder is biased in the direction of separating the movable holder from the fixed holder by means of a spring provided on the base frame, and also, on the base frame is provided a hydraulic device which moves the movable holder in the direction of approaching to the fixed holder against the resilient force of the spring. During operation of this sieving machine, in orer to clear blocking of the meshes of the wire net, the hydraulic device is actuated only when the particles of raw material which caused the blocking are shaken off by relaxing the wire net and broadening the distance between adjacent wires in the wire net.

Abstract: A rotary screen printing device for delivering coating fluid from the inside of a print cylinder through patterned openings onto an adjacent advancing substrate has a print cylinder support frame, a ring-shaped major idler having its periphery retained in rolling contact supported by several minor idlers near each side member of the support frame for rotation about the print cylinder's axis, a plurality of swiveling hooked torque rods, slidably mounted for axial movement at spaced intervals around each major idler, having a hooked inner end facing the opposite major idler, and a resilient mounting urging the hooked end toward its supporting major idler, and a pair of end rings, each secured in telescoped relationship inside one end of the print cylinder, with notches being formed at spaced intervals in the inner periphery of each ring for alignment with the swiveling hooked torque rods of a major idler.

Abstract: A vibratory screen structure which is rectangular in plan employing pretensioned screen panels and a pneumatic tube seal beneath the panels. Restraining members are positioned on two sides of the screen panels to hold the screen frames in position on the pneumatic tubes when sealed. The remaining sides are unrestrained and bow under the pressure of the pneumatic tubes to create a crown in each screen panel.

Abstract: A non-clogging and wear-reducing screen assembly for a vibrating screening machine including a substantially rigid plate having upper and lower sides and having first and second pairs of opposite edges, attachment members formed integrally with a plate on a first pair of opposite edges for attachment to a vibrating screening machine, a plurality of spaced openings throughout the substantially rigid plate and extending in both directions between the first and second pairs of the opposite edges, borders on the plate surrounding the openings, a supporting screen on the upper side of the plate, first and second superimposed contiguous abutting screens overlying the supporting screen, and adhesive firmly securing the supporting screen and the first and second screens to the borders of the openings.

Abstract: A screening device having an inflatable screen frame and a rigid screen frame member. The frame assembly expands with inflation in a self-controlled manner to tension the associated screen cloth and to fix the frame within the screening device. A method of making screen assemblies is also disclosed using heated screen cloth to fuse the frame thereto.

Abstract: Apparatus for cleaning, aerating and fumigating grain comprises chutes having screens therein over which the grain is passed. Conduits interconnect the chutes with a blower mechanism so that the grain to be cleaned is subjected to a vacuum which causes the fine debris, trash and the like to be passed through the screen. The fine debris is entrained in a stream of air and directed exteriorly of the grain storage structure. The conduits connected to the blower assembly may be detached from the grain cleaning chutes and connected to tubes inserted into the grain to permit heated gases and moisture to be removed from the stored grain. An air entrained fumigant may also be directed through the tubes into the grain for controlling insects and the like.

Abstract: A screening basket has one or more screen decks and has upright side walls integrated with cross beams. A side beam, at approximately the center of gravity of the basket, is integrated with each of the side walls as well as with the cross beams to provide a unitary, rugged basket capable of vibratory movement on a support frame. A pair of cross shafts extend transversely of the screening basket and project beyond the side walls. These shafts are journaled in the side beams and have one projecting end geared together for opposite rotation. These projecting ends carry eccentric weights of different mass to provide an oval vibratory stroke of the screening basket upon rotation of the shafts. Adjusting mechanism is provided to adjust the relative position of the weights on the shafts to vary the angle of stroke. These weights are arranged to receive auxiliary weights to vary the amplitude of vibratory stroke as well as the shape of the stroke.

Abstract: Method and apparatus for printing a design with a stencil screen including a resilient membrane formed by reversely-bent portions in the screen between a desired pattern defined by a paint-pervious opening in the screen and edge portions of the screen. The reversely-bent portions of the screen are filled with an elastomeric material and extend beyond the bent portions of the screen. A coating of an elastomeric material may be applied to the outside areas of the reversely-bent portions of the screen and adhered to the elastomeric material in the pocket of the screen by permeating the screen openings.

Abstract: A sieve screen deck, the screen of which comprises a plurality of horizontal wedge wires connected to an array of backing bars running longitudinally of the screen parallel to its fall line. The screen is connected to a frame at its two ends, at least one end being connected by resilient means such that the screen may vibrate and flex under the influence of rapping or vibrating means. Side walls are provided along sides of the sieve screen, to prevent material flowing over sides of the screen, are also formed of a resilient material in order that they do not substantially impede the ability of the sieve screen to vibrate and flex under the influence of the rapping or vibrating means.

Abstract: An apparatus is disclosed for screening and separating wood chips or the like according to thickness. In the illustrated embodiment, the apparatus comprises two generally horizontal decks mounted one beneath the other, and with each deck having three screening sections disposed in a serial arrangement along its longitudinal length. Each screening section comprises an opening in the associated deck, a stationary grid composed of parallel rod elements disposed in the opening, and a movable grid which is also composed of a plurality of rod elements and which are disposed in alternating relation with the rod elements of the stationary grid. Further, the grids are arranged so that the gaps between the rod elements are parallel and of predetermined uniform separation throughout.

Abstract: An anti-blinding grain, seed and like particulate cleaning and grading machine includes a gyrating support frame assembly, and mechanism for vibrating the assembly. Horizontally inclined opposed guide members extend along the side members of the assembly on the interior face thereof at a horizontally inclined angle to project interiorly thereof. The separating screen for separating overs and unders has side rails which are supported by the flanges which project outwardly from the side rails of a clearer ball tray to overlie the guide members. Balls trapped in the ball tray are deflected upwardly with the gyrating motion to engage the separating screen and keep it from becoming blinded. Swingable clamp shoes clamp the screen side rails and the ball tray side rails against the guide members.

Abstract: In a screen consisting of a supporting frame (1) which is covered with apertured (6) screen elements (2) of resilient material, said screen elements (2) are well supported and particularly easy to replace without intervention, e.g. by way of welding, as they have longitudinal guide grooves (7) which have a profile serving to be snapped on to the upper layer (3) of the supporting frame (1) and such a depth that the lower layer (4) of the supporting frame (1) engages the underside of the screen elements (2). In a preferred embodiment the wires or bars in the lower layer (4) of the supporting frame are disposed so as to be out of alignment with the apertures (6) of the screen elements so that also the wires in this layer are protected against wear.

Abstract: An apparatus for classifying granular material comprises an outer frame and an inner frame, a screen deck mounted in the inner frame; apparatus suspending the inner frame and deck from the outer frame; resilient apparatus mounting the deck on the inner frame; apparatus for vibrating the at least one screen at the high frequency and in a generally vertical plane and apparatus for applying the lower frequency motion to the inner frame and deck in a generally horizontal plane.

Abstract: Sifters which may comprise a plurality of elastic plates with embedded reinforcements are arranged to be releasably attached at the corners to spacer elements supported on a main frame. Adjoining corners of adjacent sieve plates are supported on a single spacer element. Each corner has a depending stub which is received in an opening in the spacer element. Each sieve element may have a peripheral sealing lip. The cross section of the frame struts is shaped to allow sifted material to fall off.

Abstract: Apparatus for supporting screen (12) in a screening machine (10) that will permit long-life of the screen even when subjected to heat and vibration. The screen or wire cloth edge is folded over (30) and fastened or joined (42, 44, 46), with a metal rod (32) inserted down through the foldover space (34). Spring clips (40) or other adjustable tensioning devices attach the steel rod (32) to the screening machine frame (50), thus placing the screen (12) in tension.

Abstract: In this screening bottom, the screening elements which are mounted on a support structure are provided with an exchangeable and automatically clamped rubber plate acting as a wear-and-tear resistant layer. Beneath the rubber plate, a reinforcing structure is provided consisting of plastic ribs and/or a reinforced structure which is imbedded in a plastic material, as well as clamping elements. The reinforced structure and the clamping elements constitute a unitary grid which is undetachably coupled with the rubber plate. Thereby, it is possible to transfer the advantages from the unit construction assembly technique to screening bottoms with associated screening elements which basically are composed of rubber with a high abrasion resistance characteristic. No complicated and expensive vulcanization molds and devices are required for making the screening elements. The molding tools which are already available for making plastic screening elements can be partially used.

Abstract: A plurality of truss-like supports are secured, as by welding, and in spaced relationship, to the underside of a screen cloth. The supported screen cloth is then removably secured in position in a vibrating frame to form therewith a vibrating screen. Each truss-like support includes a support rod formed of wire rod of predetermined diameter disposed with a major portion thereof spaced from and substantially parallel to the plane of the screen cloth, and with end portions thereof merging into the plane of the end pieces of selected wire rods forming the screen cloth and being welded thereto. A spacer wire, formed from wire rod of a diameter less than that of the support rod and to an approximate sinusoidal configuration, is disposed so that the upper tips, formed by the sine configuration, are welded to the bottom surface of the screen cloth and so that the lower such tips are welded to the upper surface of the support rod.

Abstract: Molded elastomeric framing member has internal horizontal and vertical slots which are adapted to frictionally engage several of the longitudinal profile surface wires and portions of the transverse support bar members along a side edge of a flat deck screen panel. Parallel top and bottom portions of the framing member are adapted to be engaged by a support surface of a vibrating screen apparatus and a clamping apparatus carried by said screen apparatus. The framing member prevents metal-to-metal contact between the screen panel and vibrating apparatus, thus reducing the noise level of the apparatus. It also helps protect persons handling the panel from possible injury by rough edges and eliminates the expense and labor associated with the welding of side panels to the ends of the support bars. To prevent the screen panel from becoming electrically isolated from the vibrating screen apparatus, the elastomeric framing member can be made electrically conductive.

Abstract: Apparatus for recovering silver from spent photographic solutions comprises a tray with a number of non-reactive filter elements having successively smaller porosity through which the spent solutions can be passed. Each successive filter element prevents silver particles of progressively smaller sizes suspended in the liquid from passig therethrough. The filters are stacked in a horizontal position within the tray and a tray cover sits on top of the tray, the cover having an opening into which the developing solutions can be poured. The tray includes a drainage port which allows liquid passing through the filters to drain out of the tray.

Abstract: A screening panel for use in sieving applications, comprising an elongate strip moulded from resilient plastics material such as polyurethane and having side flanges incorporated channels engageable with parallel framing bars arranged across the screening area.

Abstract: A material separating device (10) includes a frame member (13) which carries a plurality of vertically arranged support members (19-23). Each of the support members (19-23) includes a plurality of support rods (19A-D, 20A-D, 21A-D, 22A-D, 23A-D). Screen elements (24-28) are stretched by adjustable tensioning devices (30) over each of the support members (19-23) to form screen panels (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) between the support rods (19A-D, 20A-D, 21A-D, 22A-D, 23A-D). Each successive screen panel (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) is inclined at a greater angle than the preceding screen panel (24a-e, 25a-e, 26a-e, 27a-e, 28a-e) so that material being separated moves progressively faster as it traverses each screen element (24-28).

Abstract: In apertured panels comprising a plurality of wires (10) having loops (12) at intervals along their lengths and spaced so as to define slit apertures (13) between adjacent wires, the wires being connected together as a panel by tie rods, tubes or the like (11) extending through aligned loops thereof, loop parts of at least some of the wires are secured to a rib member or members extending transversely thereof. The rib member(s) may cooperate seatingly with the loops over at least part of the length of the rib member(s). The rib is preferably a hollow member, for example an inverted V-section channel. Such an arrangement is intended to overcome problems of aligning the rib to the loop in manufacture and also of distortion, specifically bowing, of the rib or/and underlying tie rod.

Abstract: The exchangeable planar screen includes a screen frame having an open lateral wall and a collecting floor and, above the floor, a meshed fabric; a duct unit assembled of at least two separate and intersecting channels adjoins the open wall of the frame whereby one channel is flush with the collecting floor and the other channel has a funnel-like inlet section adjoining the edge of the fabric and is directed perpendicularly relative to the one channel.

Abstract: The invention provides screen elements of polyurethane, or a material having similar characteristics, having metal reinforcing rods embedded in and extending only in a single direction and across the full width of the screen element between lateral support zones. A plurality of screen elements can be replaceably secured to a complementally shaped support frame member by a combined elongate fastening formation formed by two abutting elongate fastening formations respectively of two screen elements in edge-to-edge abutting relationship. For this purpose each screen element has an elongate fastening formation along the under side of each of its two opposite lateral edges, in addition to one or more securing formations at each end to secure screen formations together in end-to-end relationship. The invention also provides a screen deck consisting of screen elements secured to support frame members, as described above.

Abstract: In a sifting machine having a driven vibratory screen assembly comprising a so-called sifting basket of which a screen forms the base, the screen is releasably located by a plurality of spaced bars which extend across the screen and project at their ends through side walls of the basket. The projecting end portions of the bars are bolted to external supports on the side walls, and the bars carry spring-loaded plungers which press the frame of the screen against internal ledges on the side walls.

Abstract: A vibratory separator for separating drilling solids from drilling mud after return from the well bore, including a separator screen and a screen cleaning device positioned adjacent the screen. The screen cleaning device is supported by suitable means to permit filtered mud to pass freely through the device for collection below. The screen is a fine wire mesh mounted in a unique manner to the separator housing such that it vibrates during operation of the system to keep drilling solids from clogging the wire mesh and restricting the flow of drilling mud. The screen cleaning device serves to support the screen and mud thereon in addition to vibrating and wiping the screen as the device rotates due to the orbital oscillatory vibrations of the system.

Abstract: A screening assembly comprising a plurality of screening elements, with each element including at least one hollow tubular protrusion extending through an aperture formed in a supporting grid. The protrusion is formed with a smaller diameter than the aperture and is expanded into clamping contact with the aperture by insertion of a securing pin through the protrusion.

Abstract: A screen tensioning assembly for vibratory, particulate material-screening apparatus of the type including a frame having spaced, parallel, upstanding side panels connected by spaced, horizontal screen support members, and two, extended area apertured screens supported on the support members and extending substantially between the side panels for separating finer from coarser material. An up-turned hook portion is formed at one side of each of the screens. Each of the screens is tensioned by a clamping member having opposite ends with one end normally engaging the respective hook portion and the other end engaging the respective side panel. Each clamping member has a pivot member secured thereto adjacent its other end, extending through an aperture in the respective side panel, and having a portion engaging the respective side panel so that the clamping member may be pivoted upwardly from the respective screen to a stored position thereby to disengage the one end thereof from the respective hook portion.

Abstract: A new and improved separating device for separating particulate from a fluid stream including a plurality of screen units which are releasably held in a screen unit mounting assembly by inflatable tubes; the screen unit angular position is adjustable by adjusting the height of a plurality of adjustable support posts; and, dual vibrators are mounted with the screen unit mounting assembly and are interconnected for simultaneous vibration in mutually perpendicular directions.

Abstract: An improved filter apparatus for use in controlling emission of airborne toner from a developer housing. The filter apparatus includes a foraminous filter member made of a relatively rigid inert material which does not chemically react with toner. A gasket and cover maintain a tight seal around the filter member.

Abstract: An improved vibratory separator screen in which a wire mesh having least a first pair of opposed end portions each comprising a reinforced edge strip tensioned to a surrounding frame comprises a reinforcing spline member located adjacent each of the opposed end portions with the spline adjacent opposed ends portions being completely encapsulated, such as with cured vulcanized rubber, to fixedly secure the spline member to the adjacent opposed end portion with the mesh at a desired tautness for providing a substantially evenly tensioned mesh when tensioned to the surrounding frame. The completely encapsulated spline adjacent opposed end portions comprise the reinforced edge strips which each have sealed end points.