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    • 4. 发明授权
    • Filter bag and process of manufacture
    • 过滤袋和制造工艺
    • US5755962A
    • 1998-05-26
    • US756733
    • 1996-11-26
    • Moshe GershensonRobert S. ElliottJohn PearsonEdward G. Malawer
    • Moshe GershensonRobert S. ElliottJohn PearsonEdward G. Malawer
    • B01D25/24B01D29/23B01D39/08B01D63/00B01D29/33B01D39/16
    • B01D63/00B01D25/24B01D29/23B01D39/083B01D2239/065B01D2239/0654B01D2239/0677B01D2239/1216
    • A prefilter bag for insertion into a standard filtration bag apparatus, having a filtration assembly comprising a seamless filter membrane having uniform pore openings preselected within the range of between about 2 and about 50 microns (.mu.) and a linearly channeled, non-deformable, semi-rigid liquid transport thermoplastic sheet in the form of a molded webbing or netting in contact with the upper surface of the filter membrane; said webbing having marginal edges which are coextensive with those of the membrane; said assembly adapted to be shaped by continuous winding of the assembly upon itself for 2 to 5 complete convolutions around a tubular mandrel so as to form a cylindrical tube or cone; the bottom of said cylinder being sealed to prevent liquid leakage and the top of said cylinder, forming a liquid inlet opening, being sealed to a retaining ring adapted to be inserted in, attached to or sealed to an outer, retaining ring of a non-wrapped filter bag. The inlet of the wrapped cylindrical bag is optionally fitted with vortex directing means to enhance a linearly tangential direction of the entering liquid against the walls of the inside membrane. The invention also pertains to a method for the fabrication and use of the present filtration bag.
    • 一种用于插入到标准过滤袋装置中的预过滤袋,其具有过滤组件,该过滤组件包括预定在约2至约50微米(μ)范围内的均匀孔隙的无缝过滤膜,以及线性通道的,不可变形的半 以与过滤膜的上表面接触的模制织带或网的形式的刚性液体输送热塑性片材; 所述织带具有与膜的边缘共同的边缘; 所述组件适于通过将组件连续卷绕在其自身上以通过围绕管状心轴2至5个完整的卷绕而成形,以便形成圆柱形管或锥体; 所述气缸的底部被密封以防止液体泄漏,并且所述气缸的顶部形成液体入口,被密封到适于被插入,密封到非保持环的外部保持环的保持环上, 包装过滤袋。 包裹的圆柱形袋的入口任选地装配有涡流引导装置,以增强进入液体抵靠内膜的壁的线性切线方向。 本发明还涉及一种用于制造和使用本发明的过滤袋的方法。