Sieve apparatus containing a rotatable circular sieve
AssigneeEscher Wyss Limited
InventorWolfgang Siewert
Life of this patent
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Abstract
A sieve apparatus containing a circular sieve or screen, possessing at a portion of its circumference an impervious region. The impervious region of the circular screen forms a trough in which there can be formed a liquid sump for washing the material which is to be treated. In the case of a circular sieve or screen, formed of perforated sheet metal, the impervious region can be free of holes or openings. If the circular sieve or screen is formed of a sieve or filter material, then the circular sieve is covered at the impervious region. Spray tubes or the like serve for spraying the circular sieve, the material which is to be treated and for forming the liquid sump.
Claims11
A sieve apparatus comprising:
- a rotatable circular sieve having an inner wall structured such that at least one portion thereof is pervious over part of the circumference of the rotatable circular sieve;
- a feed worm provided with helical surface means coacting with said inner wall of said circular sieve;
- said circular sieve being provided with at least one region which is impervious to liquid;
- said impervious region extending along a portion of the circumference of the circular sieve, being located adjacent said at least one pervious portion in the circumferential direction of said rotatable circular sieve, and forming in conjunction with neighboring portions of the feed worm a trough serving to catch liquid and for forming a liquid sump;
- and
- liquid infeed means for the infeed of a flushing liquid.
Dependencies are inferred from the claim text.