NOTCHED WIRE, NOTCHED WIRE ELEMENT AND FILTRATION APPARATUS

摘要

A NOTCHED WIRE (4) THAT IS DISPOSED IN LAYERS IN A FILTRATION APPARATUS. FIRST NOTCHES (4D) ARE FORMED ON THE TOP SURFACE (4B) OF A BASE (4A) AT PRESCRIBED INTERVALS IN THE LONGITUDINAL DIRECTION OF THE BASE (4A) SO AS TO EXTEND IN THE WIDTH DIRECTION OF THE BASE 4(A). SECOND NOTCHES (4E) ARE FORMED APPROXIMATELY AT THE CENTERS OF THE FIRST NOTCHES (4D) SO AS TO EXTEND BETWEEN THE FIRST NOTCHES (4D). THE SECOND NOTCHES (4E) ARE PROJECTION STRIPES HAVING AN APPROXIMATELY SEMICIRCULAR CROSS SECTION, FOR EXAMPLE. THE SECOND NOTCHES (4E) IS SMALLER IN HEIGHT THAN THE FIRST NOTCHES (4D), AND THE WIDTH OF THE SECOND NOTCHES (4E) IS SHORTER THAN THE LENGTH OF THE FIRST NOTCHES (4D).