发明名称 |
Method of making filter body formed of cellulose-spinbanded non-woven cloth. |
摘要 |
<p>A method of making a filter body for a filter of the depth layer type comprises helically winding a braid (3) of cellulose-spinbonded nonwoven cloth around a bobbin having many pores and reciprocating in the axial direction while rotating. The braid is thus wound clockwise around the bobbin during the reciprocating movement in one direction and counter-clockwise during the reciprocating movement in the other direction so that intersections occur, and the clockwise wound braids (5-n, 5-n+1) and the counter-clockwise wound braids (6-n, 6-n+1) are successively stacked in aslant relation while partly overlapping each other to form roof-shaped structures. The height of the roof-shaped structures formed in subsequent cycles is progressively increased toward the outer periphery of the filter body so as to establish a distribution in which the space density increases progressively from the outer periphery toward the inner part of the filter body.</p> |
申请公布号 |
EP0313920(A2) |
申请公布日期 |
1989.05.03 |
申请号 |
EP19880116964 |
申请日期 |
1988.10.12 |
申请人 |
TAKANO CORPORATION |
发明人 |
WADA, YONEJI;SUZUKI, TADASHI |
分类号 |
B01D39/18;B01D39/04;B01D29/11;B01D29/21;B01D39/16 |
主分类号 |
B01D39/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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