Small volume outlet apparatus with a sieve changing device for multiple shaft screw machines

Claim 1

A small volume outlet apparatus with a sieve changing device for multiple screw shaft machines comprising three sections whose mating surfaces have coinciding passage openings therein, and wherein the continuous passageway thus formed is continuously more restrictive, said apparatus comprising (A) a first section comprising a housing, having a first passage therein, wherein said first passage is adapted to receive one or more multiple screw shafts and wherein said first passage has an inlet end and an outlet end, the cross-sectional area of said outlet end being less than the cross-sectional area of said inlet end; (B) a second section movable in the axial direction of and connected to said first section by way of a pressure clamping means, said second section comprising a housing having a second passage therein, where said second passage has an inlet end and an outlet end, the inlet end of said second passage being arranged so that it coincides to the outlet of said first passage, wherein the cross-sectional area of the outlet end of said second passage is less than the cross-sectional area of the inlet end of said second passage and wherein the cross-sectional area of the outlet of said second passage is in the shape of a slot; (C) a third section, rigidly fixed to the said second section, comprising a housing having a third passage therein, wherein said third passage has an inlet end and an outlet end, the inlet of said third passage being arranged so that it coincides with the outlet of said second passage and having an outlet end in the form of a perforated ridge of one or two rows;