DEVICE FOR BATCHING OF FRIABLE MATERIALS Russian patent published in 1994 - IPC

FIELD: batching of friable materials. SUBSTANCE: device has the form of hollow needle consisting of working channel and Z-shaped valve disposed in material outlet zone. Z-shaped valve is comprised of guide with integral three working flats. The end of guide facing the working channel has a flat. When hollow needle is stuck into fibrous matrix said flat sinks into wall at the point where working channel merges into material outlet zone. The other end of guide has flat whose size is larger than thickness of needle wall. Located above said flat is additional flat facing the material discharge zone. EFFECT: improved design. 6 dwg