Method and apparatus for dispensing of particulate material

摘要

An apparatus for dispensing particulate material comprises first (1) and second (10) hoppers in flow connection, with means (4) for restricting flow between the hoppers and (1, 10) and means (12) for recycling selected amounts of particulate material. The first hopper has a first outlet means having a tube (3). A restrictor means (1A) preferably in the form of a collet is inserted in outlet means to restrict particulate flow by altering the Venturi effect in the region of the tube.