Patent ID: 7150585
Filing Date: 2006-12-19
Classification: B05B,B65G

Abstract:
1. A device for the pneumatic conveyance of powdered material, comprising: a powder material supply, a first chamber and a second chamber, a delivery line, the first chamber connected to the powder material supply through a first pinch valve, the second chamber connected to the powder material supply through a second pinch valve, the first chamber connected to the delivery line through a third pinch valve, the second chamber connected to the delivery line through a fourth pinch valve, wherein one of said chambers receives powder from the supply while the other of said chambers discharges powder to the delivery line in alternating sequence, each said chamber being at least partially defined by a wall of a rigid hollow cylinder formed of a gas-permeable material, and to which negative pressure can be applied through the gas-permeable material to draw gas out of the chamber to receive powder material from the supply, and into which compressed gas can be admitted through the gas permeable material into the chamber to force the powdered material, which had previously been drawn into the chamber, out of the chamber to the delivery line.