| 摘要 |
PCT No. PCT/DE80/00095 Sec. 371 Date Mar. 2, 1981 Sec. 102(e) Date Mar. 2, 1981 PCT Filed Jul. 2, 1980 PCT Pub. No. WO81/00065 PCT Pub. Date Jan. 22, 1981.Sifters which may comprise a plurality of elastic plates with embedded reinforcements are arranged to be releasably attached at the corners to spacer elements supported on a main frame. Adjoining corners of adjacent sieve plates are supported on a single spacer element. Each corner has a depending stub which is received in an opening in the spacer element. Each sieve element may have a peripheral sealing lip. The cross section of the frame struts is shaped to allow sifted material to fall off. |
