An oscillation sieve, including a screen; an oscillator oscillating the screen to sieve a material; a feeder feeding the material onto the screen; a collector collecting the material having passed the screen; a remover removing the material not having passed the screen therefrom; a guide member fixed on the screen, guiding the material fed from the feeder and not having passed the screen to the remover, wherein the guide member is spiral member formed of an elastic material capable of following the oscillating screen.

An oscillation sieve, including a screen; an oscillator oscillating the screen to sieve a material; a feeder feeding the material onto the screen; a collector collecting the material having passed the screen; a remover removing the material not having passed the screen therefrom; a guide member fixed on the screen, guiding the material fed from the feeder and not having passed the screen to the remover, wherein the guide member is spiral member formed of an elastic material capable of following the oscillating screen.

The plansifter or the grain purifying machine includes at least one sieve compartment with an arrangement of several sieve elements with sieves. The sieve compartments can be brought into oscillations in the form of circling movements. At least one of the sieves is designed as a flat body. The sieve holes are present as though-holes. The sieve can be present as a metal sieve with etched through-holes or the metal sieve can be manufactured by way of an additive method. The flat body sieve with through-holes significantly improves the efficiency of the fractionating process.

The plansifter or the grain purifying machine includes at least one sieve compartment with an arrangement of several sieve elements with sieves. The sieve compartments can be brought into oscillations in the form of circling movements. At least one of the sieves is designed as a flat body. The sieve holes are present as though-holes. The sieve can be present as a metal sieve with etched through-holes or the metal sieve can be manufactured by way of an additive method. The flat body sieve with through-holes significantly improves the efficiency of the fractionating process.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device for fractionating granules for solid dosage forms, such as tablets, capsules or sachets, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.

A sieve guide assembly and a method of fractionation using a sieve guide assembly comprising a circular sieve screen (190) and a sieve guide 310 mountable in a fractionating device for fractionating granules for solid dosage forms, such as tablets, capsules or sachets, wherein the fractionating device comprises a drive adapted for: (i) in combination with a sieve screen without a sieve guide, inducing a lateral flow of granules defining lateral streamlines 31a.1. 31b.1, 31c.1, 31d.1 and an orbital flow defining orbital streamlines 31a.2. 31b.2, 31c.2, 31d.2, 31d.3 on the sieve screen (190), and (ii) in combination with the sieve guide assembly, inducing a guided lateral flow of granules defining guided lateral streamlines (331.3) and a central guided orbital flow defining central orbital streamlines (331.2) on the sieve screen (190), whereby the sieve guide assembly is adapted to provide a uniform, controlled and effective exposure of the granules to the sieve screen.

The plansifter or the grain purifying machine includes at least one sieve compartment with an arrangement of several sieve elements with sieves. The sieve compartments can be brought into oscillations in the form of circling movements. At least one of the sieves is designed as a flat body. The sieve holes are present as though-holes. The sieve can be present as a metal sieve with etched through-holes or the metal sieve can be manufactured by way of an additive method. The flat body sieve with through-holes significantly improves the efficiency of the fractionating process.

The plansifter or the grain purifying machine includes at least one sieve compartment with an arrangement of several sieve elements with sieves. The sieve compartments can be brought into oscillations in the form of circling movements. At least one of the sieves is designed as a flat body. The sieve holes are present as though-holes. The sieve can be present as a metal sieve with etched through-holes or the metal sieve can be manufactured by way of an additive method. The flat body sieve with through-holes significantly improves the efficiency of the fractionating process.