| 摘要 |
PCT No. PCT/SE91/00205 Sec. 371 Date Oct. 25, 1991 Sec. 102(e) Date Oct. 25, 1991 PCT Filed Mar. 18, 1991 PCT Pub. No. WO91/14516 PCT Pub. Date Oct. 3, 1991.A vertical screen device for a separator is disclosed. The screening device comprises a vertical cylindrical screen with a feed screw housed within the screen and cooperating with the screen. The feed screw is caused to rotate while the screen is held stationary. The improvements of the invention are provided by having the feed screw make an angle with the surface of the screen over at least a portion of its length. Further, the feed screw is made up partially of a radially inwardly non-yielding portion, and a radially outwardly aligned elastic portion. |
