| 20110044772 | POWDER TRANSPORT METHOD AND SYSTEM FOR TRANSPORTING POWDER CONSTANTLY AND SMOOTHLY - A powder transport method for transporting powder constantly and smoothly by a device comprising a transfer chamber into which a supply line and a discharge line open; a piston for generating negative pressure; a compressed gas passage through which compressed gas is injected into the transfer chamber; and a compressed gas control means, the method comprises: the discharge line is being closed when the piston reaches top dead center; then the supply line is closed; after a first predetermined time, compressed gas is injected into the transfer chamber in a manner that the total amounts of compressed gas injected are the same, then the discharge line is opened; after a second predetermined time, the piston starts its downward stroke; at the first predetermined time before the piston reaches bottom dead center, the injection of compressed gas is ceased; and the discharge line is closed and the supply line is opened. | 02-24-2011 |
