Screen for vibrating centrifugal separation machines

DETAILED DESCRIPTION What is claimed is: 1.
In a vibrating centrifugal particle separation machine, a foraminated screen in the form of a solid of revolution having a stepped shape and exhibiting symmetry about the axis of revolution thereof, said screen being adapted for simultaneous rotational motion about said axis and reciprocating motion along said axis, said screen comprising a series of hollow truncated cones, each cone having an imperforate base at the larger diameter end thereof adjacent a material inlet of said machine, so that particle-containing material flows through the interior of said screen from the base toward the smaller diameter end of each cone thereof, a major surface portion of each cone having a multiplicity of screening holes therein, each imperforate base being adapted to be secured to a bearing component of said machine.
2.
The screen according to claim 1, wherein all of said truncated cones have the same height and base diameter.
3.
The screen of claim 1 wherein the steps of the screen have a height and a pitch wherein the height for each step is the same and the pitch for each step is the same.




Description:
The present invention relates to devices for separating various loose materials and has particular reference to screens for vibrating centrifugal separation machines.
It can be used for separating seeds and various grain materials in agriculture and the food industry and for separating various loose mineral materials in the mining, chemical and other industries.
Known in the art are screens for vibrating centrifugal separation machines, which screens are designed for cleaning and/or grading loose materials and are made in the form of a solid of revolution (see, for example, USSR Inventor's Certificate No.
544476, class B 07 B 1/48).
Such a screen has the form of a hollow cylinder whose wall has a sifting part and a non-sifting part.
The generatrix of the surface of the sifting part of the screen is a straight line and, therefore, said surface is plain