| 摘要 |
PCT No. PCT/DE90/00942 Sec. 371 Date Aug. 5, 1991 Sec. 102(e) Date Aug. 5, 1991 PCT Filed Dec. 5, 1990 PCT Pub. No. WO91/08338 PCT Pub. Date Jun. 13, 1991.In a screen for pressure sorters for fiber suspensions which is of rotationally symmetrical shape in relation to a screen axis and the screen wall of which is provided with screen opening channels connecting the screen inlet side with the screen outlet side and on its inlet and outlet sides with recesses into which the screen opening channels open, in order to improve the throughput capacity of the screen, to simplify its manufacture, to achieve good fatigue strength of the screen and to generate turbulences at the screen inlet side, each of the recesses on the inlet side extends over several screen opening channels and is in the form of a groove extending transversely to the circumferential direction of the screen, a recess is provided for each screen opening channel on the screen outlet side, and the largest width of the recesses on the outlet side is at least as large as the largest width of the grooves on the inlet side.
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