B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
259/1, 222/84.3
B65G 33/18 (2006.01) B01F 3/18 (2006.01) B01F 15/02 (2006.01)
Patent
CA 1059473
ABSTRACT OF THE DISCLOSURE Apparatus for receiving and conveying a plurality of different powders simultaneously and delivering the powder- continuously as a blended mix, in which a number of concentric tubes define annular bores carrying helical screw members driven at one end for axial rotation At the delivery end the tubes are progressively inset from the outermost tube to the innermost tube. A core in the innermost tube defines the annular bore therein and is expanded diametrically at the delivery end of each tube to extend the annular bore to the end of that tube with the pitch of the helical screw member of that tube being increased over the expanded portion of the core to the end of the tube Preferably the tubes, the helical screw members and the bore are laterally flexible.
296626
Northern Telecom Limited
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