Filtering member and method of manufacturing the same

摘要

A filter ( 15 ) has a cylindrical body ( 15 a). The cylindrical body ( 15 a) is formed by laminating a plurality of pattern layers formed into a mesh form by a wire ( 16 ) in the radial direction. By repeating the traverse of the wire ( 16 ) and the reversal of the traverse direction in one winding end portion (L 1 ) and an other winding end portion (L 2 ), a plurality of turnaround points are set uniformly in the winding end portions (L 1 , L 2 ). The shortest distance (X) in the circumferential direction between a first turnaround point (B 1 ) of the plurality of turnaround points in the other winding end portion (L 2 ) and a third turnaround point (B 3 ) at which the traverse direction is reversed immediately after being reversed at the first turnaround point (B 1 ) is longer than the shortest distance (Y) in the circumferential direction between the first turnaround point (B 1 ) and a fifth turnaround point (B 5 ) located nearest to the first turnaround point (B 1 ).