| 摘要 |
PCT No. PCT/EP80/00141 Sec. 371 Date Dec. 4, 1981 Sec. 102(e) Date Dec. 4, 1981 PCT Filed Dec. 1, 1980 PCT Pub. No. WO81/02398 PCT Pub. Date Sep. 3, 1981.A screen panel for vibratory screening machines can consist of at least one cast, injection-molded or vulcanized perforated plate of elastically flexible material, such as plastic or rubber. It has a multitude of screen openings (5) and crosspieces (2, 3, 4) surrounding them which are interconnected forming one piece and thus the perforated plate. A self-cleaning effect can be achieved with such a perforated plate in the area of each individual screen opening (5) by means of a relative movement of the edges of the screen openings in order to extend the self-cleaning effect to as large an area as possible of each individual screen opening (5). For this purpose, at least two of the crosspieces (2-4) surrounding the individual screen openings (5) have a differing bending resistance by means of differing cross-sections and/or reinforcements (8). |
