| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated screen having a uniform aperture ratio of fine holes over the entire screen face, and achieving a stable solid-liquid separation efficiency. SOLUTION: This laminated screen is formed by laminating aperture reinforcing material 11 on the rear face of thin screen 10, which is thicker than than the screen 10. By using the screen 10 with fine hole groups of the same pattern independently disposed respectively at positions corresponding to respective holes 13 of the aperture reinforcing material 11, the aperture ratio of the fine holes 12 can be made uniform over the entire screen face. Strength of the screen can be increased while increasing the aperture ratio. The laminated screen can be formed into a flat or curved face, and respective fine holes 12 of the screen 10 can be formed to tapered holes expanded toward a secondary side. COPYRIGHT: (C)2008,JPO&INPIT
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