RETAINER FOR FILTER

PROBLEM TO BE SOLVED: To provide a retainer for a filter which can comprehensively solve various problems of precision, pressure loss and the like, caused by the inner structures of conventional filter elements and which has an utterly innovative structure. SOLUTION: The retainer (1) for the filter is for supporting a filter medium in both faces and is characterized in that a pair of etched disks (3a, 3b) in which a large number of through-holes (4) formed by chemical etching are arranged in the circumferential direction are joined to each other in a state that the positions of the corresponding through-holes (4) are agreed there with, and in a joined state, inner channels (8) extended in the radius direction are formed between the pair of the etched disks (3a, 3b). COPYRIGHT: (C)2010,JPO&INPIT