| 摘要 |
A screen for a shale shaker, the screen comprising at least one layer of screening material (9) characterised in that at least one ramp (7) is located on the at least one layer of screening material (9).A shale shaker comprising a screen of the invention, the shale shaker further comprising a vibratory mechanism and a basket.A screen assembly comprising at least one layer of screening material (267) and a frame (261) having four sides members (262,263,264,265) and at least one cross member (266) between two of said sides (263,265), each member (262,263,264,265,266) having a top and a bottom characterised in that said at least one layer of screening material (267) is arranged between the bottom of a first member (262,266) and the top of an adjacent member (266,264). |
