Abstract: A screening machine with a screen frame (1) which can be made to oscillate by means of a drive, comprises screen cheeks and is supported in an elastic manner on a solid base, preferably by means of springs (4), and a swing frame which is elastically coupled thereto and comprises thrust rods (5) elastically coupled to the screen cheeks as well as swing frame crossbeams (7) which connect the same and a screening surface (9, 10) which is formed by screening mats (11), with the screening mats (11) being alternatingly compressed and stretched at least in sections by alternating fastening to the screen frame (1) and to the swing frame.

Abstract: A media collection device for retrieving separation media from a container containing the media and organic or inorganic materials is described. The device has a media collecting sieve, support shaft, handle and vibrating source. The device can further have a retainer for the support shaft, a rotating motor, a sliding mechanism, a stage adjustable in height and/or angle, a media receptacle and a container stand adjustable in angle, height and position relative to the stage. Multiple media collection devices can be joined together to simultaneously collect media from multiple containers.

Abstract: A vibratory screening machine having a single vibratory motor mounted on its inner resiliently mounted frame by motor mounting structures at its ends, each motor mounting structure consisting of a combination of a fist bracket carrying a directionally stiff bushing with the fist bracket being mounted in a motor mount bracket with the fist bracket having a first cutaway portion positioned within a second cutaway portion in a rib on the base of the motor mount bracket. The directional stiffness of each bushing is aligned with the center of rotation of the vibratory motor, and this will produce linear motion when the unbalance of the vibratory motor is in line with the center of rotation of the motor and the direction of the directional stiffness of the bushings.

Abstract: In a device for collecting and re-cycling articles sent toward feeding channels, a selecting member is situated downstream of a station where the articles are accumulated, for receiving, in a predetermined way, the articles from the accumulation station. The selecting member selects and holds complying articles, separating them from fragments and from powders associated thereto. A linear conveyor member, situated downstream of the selecting member, receives the complying articles and sends them in ordered way to inlets of the feeding channels. Collecting means are situated downstream of the inlets for receiving, from the linear conveyor member, the exceeding articles situated near the inlets. Transferring means receive, from the collecting means, the exceeding articles and transfer them to an initial section of the selecting member, so that the articles are collected, recycled and their compliance is verified again.

Abstract: A screen assembly for a vibratory shaker, the screen assembly including at least two screening members, and the at least two screen members connected by sewing material. In one aspect of such a screen assembly the sewing material is thread in a stitch pattern across the at least two screening members, a pattern of expandable material on and corresponding to the stitch pattern, and the thread passing through holes in the pattern of expandable material, the expandable material expanded within the holes following extraction of a needle therefrom, the needle used to apply the sewing material, to inhibit tearing of either of the at least two screening members between holes.

Abstract: A screening machine that includes a screen having a periphery and a central porous region is provided. A motion amplifier is substantially rigidly attached in direct contact with the periphery of the screen and not in direct contact with the central porous region. A transducer is substantially rigidly attached to the motion amplifier, wherein the transducer imparts a vibratory motion to the screen via the motion amplifier.

Abstract: A screening machine having a base is provided. A screen is coupled to the base to separate material by size. The screening machine includes a vibration motor having piezoelectric elements and a vibration amplifier located between the piezoelectric elements and the screen. One or more of the piezoelectric elements can be used as sensors to provide feedback for operation control.

Abstract: A sieving device and the operation of a sieving device are proposed. The sieving device has a supporting frame which can be made to vibrate and a vibration frame which is held so as to be able to vibrate freely in relation to said supporting frame. A simple, compact design which provides good sieving and conveying performance is achieved in that the vibration frame is spring-elastically coupled to the supporting frame by helical springs, with the main spring axes of the spring elements extending in the direction of vibration of the tension waves. Furthermore, guiding elements for movable bearing arrangement of the vibration frame on the supporting frame are provided. The sieving device is operated in particular at a vibration frequency of at least 850 vibrations per minute at an average speed of approx. 11 m/s and at an average acceleration of the vibration frame relative to the supporting frame of approx. 2.2 m/s2.

Abstract: In combination, a dump truck mountable particle screener for mounting atop the dump body of a dump truck, and a dump truck. The dump-truck mountable particle screener has a support frame, a screen deck, a plurality of spring assemblies connecting the screen deck to the support frame, and a vibrating mechanism attached to the screen deck for imparting the vibratory motion to the screen deck. The dump truck receives the particle screener atop the dump body.

Abstract: A vibratory separator apparatus for separating components from a fluid material stream fed to the vibratory separator apparatus, the vibratory separator apparatus, in certain aspects, having separator apparatus for separating components of the fluid material stream, and heating apparatus for heating the fluid material stream. A screening system with a screen mounting basket, at least one screen mounted on the basket, and heating apparatus for heating the at least one screen.

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

Abstract: A method for conveying silicon fragments has the silicon fragments being conveyed over a conveyor surface, which is made from hyperpure silicon. There is a vibrating conveyor, and during the conveying, the sharp edges of the silicon fragments are rounded and mechanical-physical decontamination takes place. The vibrating conveyor has a conveyor surface which is made from hyperpure silicon. A second vibrating conveyor unit has a conveyor surface which is made from hyperpure silicon and has passage openings therethrough.

Abstract: Method and apparatus for the vibration screening of coating powders in particular, wherein a screening cloth is used, which is supported loosely on a screen frame and fixed to a clamping frame, wherein the screening cloth may additionally be supported on co-vibrating braces.

Abstract: A sieving device and the operation of a sieving device are proposed. The sieving device has a supporting frame which can be made to vibrate and a vibration frame which is held so as to be able to vibrate freely in relation to said supporting frame. A simple, compact design which provides good sieving and conveying performance is achieved in that the vibration frame is spring-elastically coupled to the supporting frame by helical springs, with the main spring axes of the spring elements extending in the direction of vibration of the tension waves. Furthermore, guiding elements for movable bearing arrangement of the vibration frame on the supporting frame are provided. The sieving device is operated in particular at a vibration frequency of at least 850 vibrations per minute at an average speed of approx. 11 m/s and at an average acceleration of the vibration frame relative to the supporting frame of approx. 2.2 m/s2.

Abstract: A seal for adjoining screen assemblies for vibrating machinery, where each screen assembly has a frame. The frame includes a planar surface. A perforated plate with a plurality of screen cloths thereon is secured to the planar surface of the frame. A first end of the frame has a seal shoulder. A second end of the frame has a seal bracket. The seal bracket of a first screen assembly engages a shoulder of a vibrating screen assembly to form a liquid seal between adjoining frames.

Abstract: A process for separating particles of a cohesive form of a polydisperse compound or composition comprising nevirapine, nevirapine hemihydrate, mexiletine or mexiletine hydrochloride according to size is disclosed which comprises milling and sizing the particles in an apparatus which includes individual and/or nested sieves each of which may also include a quantity of beads, disks and/or other geometric or non-geometric shapes. The sieves can be rotated, vibrated or agitated in any and all combinations by various methods to achieve independently horizontal rotation and vertical reciprocation (similar to a merry-go-round) to efficiently segregate, size or mill cohesive and polydisperse powder particles to specific size ranges. The invention also contemplates a method for using the apparatus in the sizing and quantification of aggregated particles of cohesive disperse powders.

Abstract: A method of reducing the carbon content of a dry bi-modal fly ash includes subjecting the bi-modal fly ash to dry vibrating screen separation into a carbon rich component and a carbon depleted fly ash component with the carbon depleted fly ash component being created with a carbon content less than about 4 percent by weight and at least 50 weight percent of the fly ash component of the bi-modal fly ash. The dry vibrating screen separation is preferably a single step process with no prior substantial concentration of the carbon component of the bi-modal fly ash. It is preferred to employ bi-modal fly ash produced as a result of combustion of coal. A method of making a concrete mixture employing the carbon depleted component is also provided.

Abstract: An apparatus for automatic screen analysis of a granular material in which the material is screened from a polygonal drum which is divided crosswise into at least two chambers by a transverse partition. A first chamber has progressively coarser screens on each of its faces except one, which has a downward slanting ramp for transferring the sample into a second chamber. Particles are transferred or chuted into the second chamber after they have been screened on all the screens of the first chamber. The second chamber has screens progressively coarser than those in the first chamber, for making more cuts. This construction increases the number of graded screening surfaces available without requiring greater drum length or more sides.

Abstract: Disclosed is a device for sequentially cleaning the screens of a particle size analyzer of the indexing drum type, as each screen moves out of the screening position. The cleaning member is preferably removed from the drum during each screening step. The particles dislodged from the screen being cleaned are returned to the sample being analyzed in a manner which maintains the accuracy of the analysis. In an alternative embodiment, each screen is cleaned during a screening step, at an indexed position other than the screening position.

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

Abstract: A process for screening materials as a function of particle size differences by feeding the materials onto one side of a substantially planar screen and vibrating the screen by producing a translational screen oscillation in directions normal to the screen plane and a torsional screen oscillation about an axis normal to the screen plane so that each point of the screen moves in a helical path. Screened material is collected at the other side of the screen and screened retentate is transported by the torsional screen oscillation to an exit port at a location spaced from the axis of torsional oscillation.The process is particularly applicable to shipboard or other mobile use, since the spring stiffness provides good structural support under tilt or side acceleration conditions.