Vibratory screening machines that include stacked screening deck assemblies are provided. In some embodiments, at least one of the vibratory screening machines may include an outer frame, an inner frame connected to the outer frame, and a vibratory motor assembly secured to the inner frame for vibrating the inner frame. A plurality of screen deck assemblies may be attached to the inner frame in a stacked arrangement, each configured to receive replaceable screen assemblies. The screen assemblies may be secured to respective ones of the plurality of the screen deck assemblies by tensioning the screen assemblies in a direction that a material to be screened flows across the screen assemblies. An undersized material discharge assembly may be configured to receive materials that pass through the screen assemblies, and an oversized material discharge assembly having a deflector may be configured to receive materials that pass over the screen assemblies.

Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.

A screen assembly for a vibrating shaker is provided. The screen assembly utilizes an elastomeric gasket having a flat profile section and a bulb profile section, wherein said bulb profile section has a hollow interior and is configured so as to form a notched profile section where said bulb profile section connects to said flat profile section.

A fat screening device includes a cylinder, and a sieve basket. The cylinder includes a feed inlet, an air outlet, a bottom water outlet, and an accommodating space. The accommodating space is in communication with the feed inlet, the air outlet, and the bottom water outlet. The feed inlet is configured to receive a mixture, the bottom water outlet is disposed at a bottom of the cylinder, the accommodating space is configured to accommodate water and fat resulting from stratification of the mixture, and the bottom water outlet is configured to discharge the water. The sieve basket covers the feed inlet and is arranged separately from the air outlet. The sieve basket is configured to screen the mixture to discharge the water and the fat into the accommodating space.

The invention relates to a method for increasing the wear resistance of a metal screen cloth made of wire, the method comprising treating a surface of a metal screen cloth by means of a thermochemical surface layer method for increasing the surface hardness and the wear resistance of metals, wherein the thermochemical surface layer method changes the structural conditions of the treated metal to a predetermined depth of penetration, wherein a hard surface layer is formed in the metal surface. A corresponding device and a screen cloth and a screen panel with increased wear resistance are also part of the invention.

Aggregate washing systems are described including mechanisms for slurrying, washing and/or dewatering aggregate material.

A screen cloth for use in a screening device for screening out oversize objects, including oil sand lumps and rocks, is disclosed comprising a supporting structure comprising two mutually opposing lateral attachment elements and a plurality of transverse stiffeners extending therebetween; and a plurality of screen segments, each screen segment having a plurality of openings, and each screen segment comprising a steel base and a plurality of anti-wear tiles attached thereon; whereby the plurality of screen segments are attached to the support structure to form a screening portion of the screen cloth.

A screening machine includes wall members, screen assembly guide members, a screen assembly and a compression assembly. The screen assembly includes a frame with a plurality of side members and a screen supported by the frame. The compression assembly is attached to at least one wall member and forms the screen assembly into a concave shape.