| 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 locate d on the at least one layer of screening material (9).A shale shaker comprisin g 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). |
