Material-conveying duct with adjustable geometry

1OF THE DISCLOSURE 2 An adjustable material-conveying duct and a flow area adjustment device are 3 described. The duct may include two wall sections, the second wall section having two 4 mounting connections, oriented at an angle with respect to one another. When the 5 second wall section is mounted to the first wall section via a first mounting connection, the 6 wall sections form a first angle in a flow channel of the duct. When the second wall 7 section is mounted to the first wall section via a second mounting connection, the wall 8 sections form a second, different angle in the flow channel. A flow sensor, controller and 9 automatic adjustment device may also be utilized to control the orientation of the wall 10 sections. QB\250261.00138(P21857)\23647151.1 cn cn 0 cn Lr) r*4 00 rn C) cn r-4 io r-I C) f14 0 r-f r-I r-i