Abstract: According to the invention a plurality of hydrocyclones (10) for cleaning liquid suspensions are combined to form uniform packages (80), each of which comprises, for example, ten hydrocyclones. The central part of each cyclone package is made up of a double chamber, one part of which is intended for the supply of the inject, i.e. the phase of the suspension which is to be cleaned, while the other part is intended for the removal of the cleaned phase, or accept. The double chamber preferably consists of a pair of twin conduits (65, 70), that is to say, two collecting conduits disposed tightly adjacent and parallel with each other, for receiving and delivering the respective suspension phases from the cyclones. The cyclones (10) are designed to be connected to the twin conduits via leak-tight pipe connections of the sleeve type, such as those known as chevron couplings (50), for example.

Abstract: A device for loading granular material containing some foreign matter into a container, such as a railroad car, has upper and lower chutes arranged in parallel. The upper chute has a bottom screen for allowing the foreign matter to fall through to the lower chute. The grain flow remaining on the upper chute is discharged down the center of the car and fills toward the sides, while the foreign matter falling to the lower chute is distributed evenly by sidewardly extending wings out toward the sides and in towards the center of the car. By the operation of the device, the foreign matter carried in the grain is evenly distributed and mixed throughout the car, and the tendency of the foreign matter to concentrate along the center under the hatchway of the car is prevented. A sample of the grain taken from the hatchway of the car thereby contains a truer percentage of foreign matter to grain than would occur by conventional loading devices.

Abstract: Apparatus and method for removing dust from particulate material, utilizing a tower or column having a passage with a series of baffles on opposite sides over which the particulate material cascades while air is drawn across the flow path of the material to remove the dust dispersed in the material and adhering to the surface of the particles of material. Air is drawn across the passage from one side to the other by vacuum or suction from a vacuum pump or the like. In performing the method using the apparatus, the particulate material is introduced at the top of the column and permitted to cascade down through the vertical passage therein from one baffle to the next, and air is drawn inwardly between the baffles on one side and outwardly between the baffles on the opposite side of the column, and, as the air flows through the material cascading between the baffles, it removes the dust from the material.

Abstract: The invention is a method and apparatus for removing veneer coating shards from granular, medicinal formulations which are being reworked. The formulation is ground up, sifted to remove the smaller pieces which do not contain veneer shards, and then placed into an air suspension under an inverted funnel-like separator cone. The separator cone has air outlets for the air suspension apparatus, as well as a vacuum inlet, adjacent its upper end. The light veneer shards ride up the sloped walls of the separator cone, and they are sucked into the vacuum inlet, thereby removing them from the granulation.

Abstract: A system for separating paper fibers from contaminants of similar lower specific gravities employs a reverse centrifugal cleaner wherein the discharge port for lights (reject) is located at the apex of the internally conical cleaner body and is formed by a tube which has it inner end located in the open apex end of the cleaner body and of smaller diameter to define with the end of the body an annular discharge outlet for heavies (accepts), the tube being releasably secured in position so that it can be temporarily retracted to relieve blockage of the heavies outlet.

Abstract: A screen panel for vibratory screening machines can consist of at least one cast, injection-molded or vulcanized perforated plate of elastically flexible material, such as plastic or rubber. It has a multitude of screen openings (5) and crosspieces (2, 3, 4) surrounding them which are interconnected forming one piece and thus the perforated plate. A self-cleaning effect can be achieved with such a perforated plate in the area of each individual screen opening (5) by means of a relative movement of the edges of the screen openings in order to extend the self-cleaning effect to as large an area as possible of each individual screen opening (5). For this purpose, at least two of the crosspieces (2-4) surrounding the individual screen openings (5) have a differing bending resistance by means of differing cross-sections and/or reinforcements (8).

Abstract: The invention relates to a percussion jig in which the carrier for material to be separated is freely suspended in the region of its centroidal axis on the piston rod of a hydraulic drive cylinder. This results in a particularly simple construction subject to little wear.

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

Abstract: A powder classifier having two stages of classification blades which are arranged to intersect the radial directions of the powder classifier.

Abstract: A jigging machine comprises at least one pulsation chamber, particularly for finest grain sizing of coal or other minerals which traverse the jigging machine on the jig bed which is shorter in the direction of motion of the minerals that at right angles to the direction of motion, whereby the jigging machine is designed as a bottom-pulsed machine. The jigging machine comprises curved lateral walls whose curvature is such that only tensile stresses occur in the walls, is designed suspended in an upper frame, and has the pulsation chamber disposed immediately below the jig bed which rests on cross tie rods.

Abstract: This invention relates to a method in the operation of magnetic separators comprising a plurality of canisters or like devices (4) containing magnetizable induction poles (41) arranged to pass through a magnetic field (1). While the canisters (4) are located in the magnetic field (1), a particle suspension is supplied (5) to the canisters, in which magnetizable particles are attracted to the induction poles (41). Rinsing fluid (6) may optionally be supplied to the canisters while the canisters are still located within the magnetic field (1), thereby to remove non-magnetic particles through discharge means (7a, 7b) for fluid and non-magnetic material. Outside the magnetic field flushing fluid is supplied in a flushing station (8, 56), this flushing fluid removing magnetic material through discharge means (8, 57) for magnetic material. The canisters (4) are provided with flexible sealing lips (36) as disclosed in U.S. Pat. No.

Abstract: According to the method the stock suspension is moved across a mass force field due to gravity or centrifugal acceleration in the form of stock stream or current and contacts a pick-up surface moved in conjunction with the stock stream and at substantially the same velocity. The apparatus may comprise a housing in which a turbulent or vortex flow is generated and containing a rotor therein which possesses the pick-up surface. Further embodiments have a guiding wire or screen which is moved along a pick-up cylinder or is trained around the same and upon which there is formed a layer of the stock suspension by using a stock supply device. A band, for example a wire band, may be provided to pick-up the contaminants.

Abstract: An upwardly pyramidal frame, formed of angularly spaced legs converging to a point, is mountable on a holder that extends about a fill opening of the pressure tank of a blast cleaning system. The frame is so disposed as to break open the end of a bag containing an abrasive media, when the bag is dropped onto the frame, with the break occurring at a location confined to the area of the fill opening. A screen supported upon a shoulder of the holder extends across the opening. At the bottom of the frame, outwardly directed feet on the legs extend into a space between the shoulder on which the screen is supported, and opposing, downwardly facing shoulders. Screws threaded in the feet bear against the peripheral portion of the screen, to clampably engage the feet and the screen against the opposed shoulders. When a screen is to be replaced, the screws are backed off, to loosen the frame and screen and permit their removal and replacement.

Abstract: A magnetic drum for separating ferrous and non-ferrous beverage containers having a plastic drum which rotates around a series of permanent magnets mounted on a structural support. The plastic drum has an inner cylindrical portion coupled to a power roller which induces rotational movement in the plastic drum. An input chute funnels ferrous and non-ferrous crushed beverage containers onto the outer cylindrical portion of the plastic drum such that crushed ferrous beverage containers are held against the outer cylindrical portion and traverse a predetermined distance around the circumference of the outer cylindrical portion until they are no longer within the influence of the magnetic force field produced by the permanent magnets mounted between the outer cylindrical portion and inner cylindrical portion of the plastic drum.

Abstract: A rear dump truck for transporting particulate material and simultaneously discharging and sieving the material. The rear dump truck includes a load box divided into a front section and a rear section by a partition dump door. The front section of the box forms a load chamber space for carrying the particulate material and the rear section forms a load chamber space including wire sieves for sieving purposes. To adjust the flow rate of the particulate material passing from the front section into the rear section through below the partition dump door upon the tilting up of the box, a stopper which is tiltable by a hydraulic jack is positioned just before the partition dump door. The particulate material is supplied in a suitable amount at a given time through the adjustment of the tilting of the stopper and passes onto the wire sieves. The material is sieved and the sieved particles are discharged through rear dump doors according to the particle sizes.

Abstract: A method of controlling the separation of coal from a mixture of coal and refuse in a froth flotation device by measuring the differential back pressure between two gas bubbler tubes immersed to different depths into the body of pulp in the device to produce a first control signal representative of the pulp density, and adjusting the rate of addition of a froth enhancement additive to the froth flotation device responsive to changes in said first signal; a second signal, produced by measuring back pressure of a single bubbler tube and representative of the pulp level in said device, can be corrected for changes in density by combining it with said first signal and then utilized to control liquid level in the cell by adjusting the rate of withdrawal of refuse therefrom.

Abstract: An apparatus for classifying particulate material with air currents wherein the particulate material containing various kinds of particles of different sizes is conveyed with air currents and the particles are given with forces of inertia differing from one another depending on particle size, including a supply port for supplying the particulate material to be classified, an air current inlet port for introducing into the apparatus an air current of high flow velocity located in the vicinity of the particulate material supply port, air current inlet ports for introducing into the apparatus other air current of lower flow velocity than the air current of high flow velocity, a main passage formed in the apparatus communicated with the particulate material supply port and the air current inlet ports, and a subsidiary passage branching from the main passage located at the side of the apparatus at which one of the air currents of low flow velocity flows.

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: Solids comprising a magnetically stabilized fluidized bed are transported in a direction transverse to the flow of the fluidizing fluid exiting the bed by contacting at least a portion of said solids with fluidizing fluid which enters the bed with a velocity component in the direction of solids flow; i.e. the transverse flow direction. In a preferred embodiment, the fluidizing fluid entering the bed is passed through a distribution means containing propulsion passages slanted in the desired direction of solids flow which serve to orient the fluidizing fluid in the transverse flow direction. Use of this invention eliminates the need for the costly and inconvenient pneumatic, hydraulic and mechanical transport devices employed in the prior art. Solids attrition and elutriation are also reduced.

Abstract: A hydrocyclone comprising a frusto conical feed box extension, a feed box attached to the larger end of the feed box extension, the feed box having a tangential feed pipe, an overflow box positioned over the feed box and including an overflow pipe and a vent pipe, and a fish tail at the narrower end of the feed box extension, characterized in that a pressure compensating valve is positioned in the vent pipe, and operation of the valve is dependent on the pressure within the feed pipe. The pressure compensating valve comprises a valve member biased to an open position against a diaphragm located in a pressure chamber, one side of the diaphragm being in fluid communication with the feed pipe whereby variation of the pressure within the feed pipe causes the diaphragm to displace the valve member to a partially or totally closed position against an associated valve seat.