Patent ID: 8581134

Claim:
An apparatus for dry granulation, comprising: compacting means capable of producing compaction force which when applied to a powder produces a compacted mass comprising a mixture of fine particles and granules; fractionating means adapted to separate and remove fine particles and/or small granules from the granules by entraining the fine particles and/or small granules in a gas stream; and means to provide the gas stream; wherein the fractionating means comprises: a rotating device, the compacted mass flowing in said gas stream inside the rotating device and along an axis of the rotating device, the rotating device containing apertures through which the fine particles and/or small granules are entrained, wherein a direction of a flow of the gas stream has a component which is contrary to a direction of flow of the compacted mass; and wherein the fractionating means does not require passage of the compacted mass through any sieve.