| 摘要 |
A screen assembly for use in a vibratory separator, the screen assembly comprising first and second layers of screening material, said first layer having screen mesh (232) with oblong openings, each of the oblong openings having a width (W1) and a length (L1), the ratio of the length to the width (W1) ranging between 1.55 and 2.00. Preferably, the second layer has screen mesh (233) with oblong openings, each of the oblong openings having a width (W2) and a length (L2), the ratio of the length (L2) to the width ranging between 1.55 and 2.00. Advantageously, the ratio of the length (L1) of the oblong openings of the first layer to the width (W2) of the oblong openings of the second layer ranges between 0.95 and 1.05. |
