Patent ID: 8290406

Claim:
A powder conveying device comprising: a conveying passage in which powder is conveyed from a first powder accommodating chamber toward a second powder accommodating chamber, the powder being accommodated in the first powder accommodating chamber and the second powder chamber; a conveying member that is disposed in the conveying passage, and includes a rotating shaft that is rotatable, and a blade member that is spirally provided around the rotating shaft, and can convey the powder by rotation of the rotating shaft; an intake region that is formed on the conveying passage where the conveying member is disposed, and includes an intake port through which the powder is taken in from the first powder accommodating chamber; a first conveying region that is formed on the conveying passage where the conveying member is disposed, and is arranged on a downstream side of the intake region in a conveying direction of the powder; and a second conveying region that is formed on the conveying passage where the conveying member is disposed, and is arranged on a downstream side of the first conveying region in the conveying direction, a conveyable volume of the powder per one revolution of the conveying member at the second conveying region being lower than that at the first conveying region, wherein the rotating shaft of the conveying member is extended along the intake region, the first conveying region and the second conveying region.