公开(公告)号：US4968425A

公开(公告)日：1990-11-06

申请号：US234024

申请日：1988-08-18

申请人： Yoshiaki Nakajima ,  Tadashi Suzuki ,  Yoneji Wada

发明人： Yoshiaki Nakajima ,  Tadashi Suzuki ,  Yoneji Wada

IPC分类号： B01D27/00 ,  B01D27/04 ,  B01D29/39 ,  B01D29/46 ,  B01D39/16

CPC分类号： B01D29/15 ,  B01D29/111 ,  B01D2201/182 ,  B01D2201/60

摘要： A filter of depth layer type comprises a generally cylindrical filter body formed by laminating filter elements each in the form of a thin sheet of a filtering material having a central hole, and these central holes provide a conduit extending in the axial direction through the filter body. The filter body has a density distribution in which the density is lowest at the outer peripheral area sewing as an inlet for a fluid to be filtered and becomes progressively higher toward the conduit to serving as an outlet for the fluid to be filtered.