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| Number | Title | Issue Date |
| 7614502 | Apparatus and method for making and sorting articles of mail A pre-printed label is attached to an article of internal or interdepartmental mail. The label is imprinted with a matrix of boxes that are selectively scratched or blackened out by a sender to represent a destination mail stop code. The matrix includes a lead-in ma... | 11/10/2009 |
| 7341154 | Water bath separator A water bath separator includes a tank for receiving a volume of water for forming a water bath having a top water surface and a light material conveyor path extending from the tank such that an upstream end of the light material conveyor path is closely below the t... | 03/11/2008 |
| 6293407 | System for debris elimination and item separation and method of use thereof A item separating or debris eliminating system includes a tank and a pump for circulating water from one end of the tank around through a duct and back into the opposite end of the tank. A medium density object collector is located within the tank, and a ... | 09/25/2001 |
| 5280837 | Door for an improved separation device A door (20) for a separation table (10) is pivotably installed within discharge chute (12). The door is pivotable between a closed position and an open position. The door has a distal planar section (24) that lies horizontally against the floor wall (38) ... | 01/25/1994 |
| 4946044 | Aeration separator An aeration separator for separating lighter and heavier materials in a separation chamber in which the material flows through a downwardly sloping passage in the lower region of the separation chamber toward a lower discharge while air flows upwardly thr... | 08/07/1990 |
| 4559135 | Short, broad jigging machine, particularly for finest grain sizing of minerals A jigging machine comprises at least one pulsation chamber, particularly for finest grain sizing of coal or other minerals which traverse the jigging machine on the jig bed which is shorter in the direction of motion of the minerals that at right angles t... | 12/17/1985 |
| 4543180 | Device for separating coarse and fine particles from ultrafines A device for separating fine articles as sand from a sludge containing ultrafine articles comprises a continuously rotated substantially horizontal drum having a helical web at the peripheral inside thereof. The mass flow to be separated is deposited in t... | 09/24/1985 |
| 4388182 | Mineral separation by particle settling characteristics Method and apparatus 10 permits material immersed in a body of fluid to move under the influence of gravity across inclined surfaces 14 and 24 having an angle of incline below the horizontal approximately equivalent to that of the repose angles an... | 06/14/1983 |
| 4319994 | Gold mining pan A gold mining pan having riffle-like slits or grooves in the bottom and a device for separating the material contained in the slits or grooves from the remainder of a slurry contained within the pan. The pan may also include a device for removing the mate... | 03/16/1982 |
| 4191642 | Method of separating granular pourable materials of different densities in a gaseous or liquid medium A method of separating granular pourable materials in fluidized bed layers formed by fluid media. These layers are withdrawn by a fluidizing medium from the top downwardly one after the other down to slightly above the border surface of the lowest layer b... | 03/04/1980 |
| 3984320 | Vacuum filter leg for clarifying vessel An apparatus and a control system for receiving the mud-like discharge from a liquid clarifying vessel and dewatering it into the form of slugs by vacuum means connected to the annular space surrounding a stand pipe connected to the discharge outlet. A ti... | 10/05/1976 |
