| 摘要 |
PROBLEM TO BE SOLVED: To provide a heavy machine-operated sieve screen bucket which can retain the benefits of a known sieve screen and further reduce the tendency of sticking and unnecessary crushing of the material being screened.SOLUTION: A plurality of screening plates 3 are spaced from each other and establish a screening surface 2, which is provided with screening slots and on top of which the material to be screened can be placed. There are rotatable shafts 4 below the screening surface 2. The shafts 4 are provided with blades 5, which are projecting from the shafts and which extend through the screening slots to above the screening surface 2. The blades taper in a wedge-like manner towards their rounded tips. Side edges of the blades are substantially straight, and the angle between the same is in the range of 20 to 28 degrees. |
