| 摘要 |
This invention relates to a bar screen module of a vibratory feeder, comprising screen bars (1) extending in moving direction of a material, and screen apertures (2) arranged between the bar screens to enlarge wedge- shapedly in the moving direction of the material. The invention is characterized in that the upper part of each screen bar (1) is divided in th e moving direction of the material into at least two parts (1a,1b) extending o n different levels, whereby all upper surface parts (1a and 1b, respectively) of each level of the bar screen module form a stair step extending on the level in question transversely to the moving direction of the material.
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