Abstract: A mechanical separator having a primary frame, a tray frame linked to the primary frame, and an oscillator linked to the tray frame for imparting relatively short period reciprocating and/or orbital motion thereto. The tray frame includes a plurality of tines preferably rigidly linked at their proximal ends to one end of the tray frame, and a supporting cross member that permits restricted motion of the tines when subject to kinetic impetus. The supporting cross member preferably defines holes through which the tines pass, and the distal ends of the tines are preferably free to move, being only restricted in motion by the supporting cross member. The tray frame is preferably suspended from the primary frame by extension members, which also provide for tilt, elevation and vibration isolation features.

Abstract: Disclosed is a vibrating material sorting screen with a substantially variable tilt angle and a tilt angle measuring device where the screen has a gear box which is horizontal when the screen is horizontal and inclined when the screen is inclined and further where the gear box has a plurality of oil level sensors or indicators therein which are sized, placed and configured to provide proper oil volume while the screen is oriented horizontally or at various inclines.

Abstract: A screening machine of the type used to separate or classify mixtures of solid particles of different sizes includes a fixed base and a perforate screen mounted for movement relative to the base during a screening operation. The screens are pre-tensioned and mounted in a perimeter frame for separating various granular and particulate material. The frame is slid into the side of the machine in a direction parallel with two opposing bevel lips at the ends of the frame which mate in the screening machine with a complementary channel such that when the screen is raised into sealing contact in the screening machine, the bevel ends of the screen panel frame align the screen panel in the machine. The bevels on the screen panel frame provide a positive sealing surface for contact with the adjacent portions of the channel to prevent product from escaping off of the screen during use. The sealing contact of the screen panel is enhanced by a seal member on the screen panel.

Abstract: A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25-45 &mgr;m and a number average particle diameter of Dp which meets with the following condition: 1≦Dv/Dp≦1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 &mgr;m is at least 70% by weight and particles having a particle diameter of less than 22 &mgr;m is not more than 7% by weight.

Abstract: An oscillator apparatus for sorting out pieces of lumber for separating smaller scraps of wood from larger usable pieces of wood. The oscillator apparatus for sorting out pieces of lumber includes a base assembly including leg members and elongate side members interconnecting pairs of leg members; and also includes a table assembly being movably mounted upon the base assembly; and further includes an oscillator assembly being mounted to the base assembly for oscillating the table assembly.

Abstract: A sieving device with a vibratory supporting frame and a vibration frame which is held against said supporting frame so as to be able to vibrate freely. 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 torsion-bar-like spring elements.

Abstract: A vibratory screen system including a screen assembly having screen cloth on both the top and the bottom of the frame. The screen cloth on the bottom has openings larger than and up to five times the size of the openings on the upper screen cloth. A pattern of dividers divide the screen into compartments. The screens are bonded to the frame and to the pattern of dividers.

Abstract: A portable shaker frame that is particularly adapted for separating irregularly-shaped wood shavings used in animal stalls as bedding materials from manure contained in the bedding material. The wood shavings are recovered for reuse and the manure is separated therefrom for disposal. The shaker frame is inclined and is suspended on springs carried on a carriage having wheels to permit it to be moved from place to place. The springs permit the shaker frame to vibrate relative to the carriage frame. The shaker frame includes a number of longitudinally extending, substantially parallel steel rods that are spaced from each to enable the irregularly-shaped wood shavings to pass therethrough while the manure slides downwardly along the rods and into a collection container for disposal. A vibratory motor is positioned on an end panel of the shaker frame for imparting vibratory motion to the rods carried by the shaker frame.

Abstract: A vibratory screening apparatus has two vibrator motors (19, 20, 19', 20') having respective out-of-balance weights arranged to produce substantially linear vibratory movement when, in use, these motors (19, 20, 19', 20') are running in mutually opposite directions, an electrical control means (37) connected to the motors (19, 20, 19', 20') and is selectively operable between a non-running mode in which both motors (19, 20) (19', 20') are stopped and two running modes in one of which both vibrator motors (19, 20, 19,' 20') run in mutually opposite directions to produce substantially linear vibratory movement and in the other of which at least one of the motors (19, 20, 19', 20') is rotationally reversed and both motors (19, 20, 19', 20') run to produce orbital vibratory movement.

Abstract: A vibrating screen for the sizing of granular material such as gravel, sand, crushed stone, etc., having a frame (1) and a screen body (2) supported on springs (6), directional oscillating movements being imparted to the screen body by a motor powered vibrator mechanism (3). The screen has two or more screen decks (11-13), each one divided into three component screens (14a-c, 15a-c, 16a-c) having successively decreasing inclinations in a direction towards the discharge end (9) of the screen, each lower screen deck furthermore having an increased inclination in relation to the nearest deck above.

Abstract: Particle separating apparatus includes a horizontally disposed rectangular screen or grid having openings adapted to pass smaller particles from a stream of particles of varying sizes while retaining larger particles upon the top of the screen. A conveying screw mounted in a trough below the screen conveys the smaller particles forwardly along the trough to a discharge opening. The screen is mounted above the screw for horizontal reciprocation along a path parallel to the longitudinal axis of the screw and is biassed by springs engaged between the front and rear ends of the screen and stationary surfaces to a normal rest position midway between the ends of the reciprocating path.

Abstract: An apparatus and method for sizing and separating particles of a material. The apparatus includes a stand, a frame having a pair of ends and an intermediate portion, and suspension assemblies attached to the stand and the frame for movably suspending the frame on the stand. A pair of inclined screens are removably mounted in a pair of screen boxes removably mounted on the frame, with each of the screens sloping downwardly from the intermediate portion of the frame toward a respective one of the ends of the frame. At least one motor is mounted on the frame for vibrating the frame and attached screens, and a feed box is mounted on the stand adjacent to and above upper ends of the screens for supplying a material to be sized. The method of the invention includes the steps of actuating the motor and depositing a material onto the upper ends of the screens via the feed box, so that the vibrating screens can simultaneously size and separate particles of the material.

Abstract: The invention concerns a screening apparatus comprising two frame systems which are movable relative to one another, comprising grate bars assigned to each system, which grate bars of each frame system are alternately disposed and are connected by means of flexible screen elements which are fastened at the latter, bridge the distance between the bars, and are tensioned and relieved of tension by means of the relative movement of the two systems caused by means of an eccentric shaft which is supported exclusively at the two systems and rotated by means of a drive. This known construction is improved, according to the invention, in that the eccentric shaft is arranged at one end of the two systems (1, 7) and the latter are connected with one another at a distance from this end by means of an element (12) which ensures a substantially linear relative movement of the two systems relative to one another. The aforementioned distance preferably corresponds to the distance of the acceleration pole (P.sub.

Abstract: The method of screening solid materials resides in feeding a solid material onto a sifting surface and imparting oscillations to surface under the action of an effort directed at an angle to the longitudinal axis of the sifting surface, providing for moving particles of the solid material directly engaging the sifting surface from the loading zone to the discharge zone at an acute angle to the vertical component of the applied effort, and limiting their displacement in a direction normal to the sifting surface. The apparatus for performing the method comprises a box carrying a vibrator and a support frame with a sieve secured thereto at an angle to a vertical plane including the longitudinal axis of the box, the sieve being associated with a screen for limiting the displacement of the solid material particles in a direction normal to the surface of the sieve.

Abstract: A tray classifier in which the trays are locked together easily, and stay locked together while being shaken, but are movable with respect to each other if the trays came in contact with an object. The trays have upper and lower locking surfaces which nest with the locking surfaces of the stack locking member of an adjacent upper or lower tray.

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: Vibratory screening apparatus wherein a filtrating cradle incorporating screens is vibrated on a machine base, and wherein a bottom screen (56) in said cradle (12) can be withdrawn between an upper support (64) on said cradle and an intermediate support (54) on a bottom screen frame (52), which frame is also withdrawable from the machine on a lower support (62) on the cradle, hydraulic expander means (60) being provided to act on the lower support so that, in the inserted position of the bottom screen frame, the opposed sides of the bottom screen can be clamped between the upper and intermediate supports, locking the bottom screen and its support in position.

Abstract: Apparatus for transferring heat between solid particles includes placing a first granular material composed of particles of a first size on the upper side of a downwardly sloping vibratory screen. The openings in the screen are sufficiently small to prevent passage therethrough of the particles of the first material. A second granular material composed of particles of a second size, smaller than the first size, is spread over the first material on the screen to mix with and sift through the first material as the screen is vibrated. The size of the particles of the second material is small enough to allow passage through the openings in the screen. The first and second materials are at different temperatures so that as the particles of the two materials mix, heat is transferred between the particles. After mixing and heat transfer, the first material flows off the lower edge of the screen where it can be gathered, and the second material flows through the screen where it likewise can be gathered.

Abstract: Sieving apparatus comprising a sieve carrier, means for imparting longitudinal vibratory movement to the sieve carrier said movement having substantially no vertical component, a sieving medium, a sieve frame to which said sieving medium is secured and supporting said sieving medium at an inclination of not more than 5.degree. to the horizontal, resilient means interposed between the sieve frame and the sieve carrier to support said sieve frame in said sieve carrier, an ultrasonic generator mounted on said sieve carrier and separate from said means for imparting vibratory motion, and coupling means coupling the output from said ultrasonic generator to said sieve frame, in a direction substantially parallel to the plane of the sieving medium.

Abstract: A foundry sand reclaiming apparatus is provided in which lumps of used foundry sand are introduced into a vibrating chamber. The lumps abrade each other to produce discrete particles of reusable foundry sand. As the sand builds up in the chamber, the vibratory action moves the sand to an exit opening from which it is discharged from the vibrating chamber. The vibratory conveying action produced during the sand abrading step may be reversed to cause irreducible particles to move toward and be removed from a discharge outlet.

Abstract: A new and improved nonadjustable self-cleaning dewatering screen panel assembly suited to vibratory dewatering of fluid slurries containing fine particulate solid material is comprised of a rigid frame member and a substantially planar screen panel mounted within the frame and secured thereto under tension in both planar directions. The screen panel is a unitary one piece elastomeric sheet consisting of a plurality of pulsator portions and integral bordering stabilizer portions. The pulsator portions of the elastomeric panel are comprised of a multitude of substantially identical diaphram elements arranged in intimate, aligned and confronting relationship so as to present a smooth top screening surface.